detailed information: The input equation set is: Question solving process:
Subtract both sides of equation (1) from both sides of equation (5) ,the equations are reduced to:
 | | | | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (5) |
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Subtract both sides of equation (1) from both sides of equation (9) ,the equations are reduced to:
 | | | | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (5) |
| | | | -1 | B | | -1 | C | | -1 | D | + | | F | + | | K | + | | P | = | | 0 | | (9) |
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Subtract both sides of equation (1) from both sides of equation (11) ,the equations are reduced to:
 | | | | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (5) |
| | | | -1 | B | | -1 | C | | -1 | D | + | | F | + | | K | + | | P | = | | 0 | | (9) |
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Subtract both sides of equation (1) from both sides of equation (16) ,the equations are reduced to:
 | | | | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (5) |
| | | | -1 | B | | -1 | C | | -1 | D | + | | F | + | | K | + | | P | = | | 0 | | (9) |
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交After the exchange of equation (2) and equation (5), the equation system becomes:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (2) |
| | | | | | | -1 | B | | -1 | C | | -1 | D | + | | F | + | | K | + | | P | = | | 0 | | (9) |
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Add both sides of equation (2) to both sides of equation (6) ,the equations are reduced to:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (2) |
| | | | -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | + | | M | + | | N | = | | 33 | | (6) |
| | | -1 | B | | -1 | C | | -1 | D | + | | F | + | | K | + | | P | = | | 0 | | (9) |
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Subtract both sides of equation (2) from both sides of equation (9) ,the equations are reduced to:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (2) |
| | | | -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | + | | M | + | | N | = | | 33 | | (6) |
| | | -1 | E | + | | F | | -1 | I | + | | K | | -1 | M | + | | P | = | | 0 | | (9) |
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Subtract both sides of equation (2) from both sides of equation (16) ,the equations are reduced to:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (2) |
| | | | -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | + | | M | + | | N | = | | 33 | | (6) |
| | | -1 | E | + | | F | | -1 | I | + | | K | | -1 | M | + | | P | = | | 0 | | (9) |
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交After the exchange of equation (3) and equation (6), the equation system becomes:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | + | | M | + | | N | = | | 33 | | (3) |
| | | | | | -1 | E | + | | F | | -1 | I | + | | K | | -1 | M | + | | P | = | | 0 | | (9) |
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Add both sides of equation (3) to both sides of equation (7) ,the equations are reduced to:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | + | | M | + | | N | = | | 33 | | (3) |
| | | | -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | + | | K | + | | M | + | | N | + | | O | = | | 66 | | (7) |
| | -1 | E | + | | F | | -1 | I | + | | K | | -1 | M | + | | P | = | | 0 | | (9) |
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Subtract both sides of equation (3) from both sides of equation (11) ,the equations are reduced to:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | + | | M | + | | N | = | | 33 | | (3) |
| | | | -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | + | | K | + | | M | + | | N | + | | O | = | | 66 | | (7) |
| | -1 | E | + | | F | | -1 | I | + | | K | | -1 | M | + | | P | = | | 0 | | (9) |
| | -1 | I | | -1 | J | | -1 | M | | -1 | N | = | | -33 | | (11) |
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Add both sides of equation (3) to both sides of equation (12) ,the equations are reduced to:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | + | | M | + | | N | = | | 33 | | (3) |
| | | | -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | + | | K | + | | M | + | | N | + | | O | = | | 66 | | (7) |
| | -1 | E | + | | F | | -1 | I | + | | K | | -1 | M | + | | P | = | | 0 | | (9) |
| | -1 | I | | -1 | J | | -1 | M | | -1 | N | = | | -33 | | (11) |
| | E | + | | F | + | | G | + | | H | + | | I | + | | J | + | | M | + | | N | = | | 66 | | (12) |
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交After the exchange of equation (4) and equation (7), the equation system becomes:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | + | | M | + | | N | = | | 33 | | (3) |
| -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | + | | K | + | | M | + | | N | + | | O | = | | 66 | | (4) |
| | | | | -1 | E | + | | F | | -1 | I | + | | K | | -1 | M | + | | P | = | | 0 | | (9) |
| | -1 | I | | -1 | J | | -1 | M | | -1 | N | = | | -33 | | (11) |
| | E | + | | F | + | | G | + | | H | + | | I | + | | J | + | | M | + | | N | = | | 66 | | (12) |
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Add both sides of equation (4) to both sides of equation (8) ,the equations are reduced to:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | + | | M | + | | N | = | | 33 | | (3) |
| -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | + | | K | + | | M | + | | N | + | | O | = | | 66 | | (4) |
| | | | | E | + | | F | + | | G | + | | H | + | | I | + | | J | + | | K | + | | L | + | | M | + | | N | + | | O | + | | P | = | | 99 | | (8) |
| -1 | E | + | | F | | -1 | I | + | | K | | -1 | M | + | | P | = | | 0 | | (9) |
| | -1 | I | | -1 | J | | -1 | M | | -1 | N | = | | -33 | | (11) |
| | E | + | | F | + | | G | + | | H | + | | I | + | | J | + | | M | + | | N | = | | 66 | | (12) |
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Add both sides of equation (4) to both sides of equation (10) ,the equations are reduced to:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | + | | M | + | | N | = | | 33 | | (3) |
| -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | + | | K | + | | M | + | | N | + | | O | = | | 66 | | (4) |
| | | | | E | + | | F | + | | G | + | | H | + | | I | + | | J | + | | K | + | | L | + | | M | + | | N | + | | O | + | | P | = | | 99 | | (8) |
| -1 | E | + | | F | | -1 | I | + | | K | | -1 | M | + | | P | = | | 0 | | (9) |
| | E | + | | F | + | | 2 | G | + | | I | + | | 2 | J | + | | K | + | | 2 | M | + | | N | + | | O | = | | 99 | | (10) |
| -1 | I | | -1 | J | | -1 | M | | -1 | N | = | | -33 | | (11) |
| | E | + | | F | + | | G | + | | H | + | | I | + | | J | + | | M | + | | N | = | | 66 | | (12) |
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Add both sides of equation (4) to both sides of equation (16) ,the equations are reduced to:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | + | | M | + | | N | = | | 33 | | (3) |
| -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | + | | K | + | | M | + | | N | + | | O | = | | 66 | | (4) |
| | | | | E | + | | F | + | | G | + | | H | + | | I | + | | J | + | | K | + | | L | + | | M | + | | N | + | | O | + | | P | = | | 99 | | (8) |
| -1 | E | + | | F | | -1 | I | + | | K | | -1 | M | + | | P | = | | 0 | | (9) |
| | E | + | | F | + | | 2 | G | + | | I | + | | 2 | J | + | | K | + | | 2 | M | + | | N | + | | O | = | | 99 | | (10) |
| -1 | I | | -1 | J | | -1 | M | | -1 | N | = | | -33 | | (11) |
| | E | + | | F | + | | G | + | | H | + | | I | + | | J | + | | M | + | | N | = | | 66 | | (12) |
| | | | | F | + | | G | + | | J | + | | K | + | | M | + | | N | + | | O | + | | P | = | | 66 | | (16) |
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Subtract both sides of equation (5) from both sides of equation (8) ,the equations are reduced to:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | + | | M | + | | N | = | | 33 | | (3) |
| -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | + | | K | + | | M | + | | N | + | | O | = | | 66 | | (4) |
| | | | | I | + | | J | + | | K | + | | L | + | | M | + | | N | + | | O | + | | P | = | | 66 | | (8) |
| -1 | E | + | | F | | -1 | I | + | | K | | -1 | M | + | | P | = | | 0 | | (9) |
| | E | + | | F | + | | 2 | G | + | | I | + | | 2 | J | + | | K | + | | 2 | M | + | | N | + | | O | = | | 99 | | (10) |
| -1 | I | | -1 | J | | -1 | M | | -1 | N | = | | -33 | | (11) |
| | E | + | | F | + | | G | + | | H | + | | I | + | | J | + | | M | + | | N | = | | 66 | | (12) |
| | | | | F | + | | G | + | | J | + | | K | + | | M | + | | N | + | | O | + | | P | = | | 66 | | (16) |
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Add both sides of equation (5) to both sides of equation (9) ,the equations are reduced to:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | + | | M | + | | N | = | | 33 | | (3) |
| -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | + | | K | + | | M | + | | N | + | | O | = | | 66 | | (4) |
| | | | | I | + | | J | + | | K | + | | L | + | | M | + | | N | + | | O | + | | P | = | | 66 | | (8) |
| | 2 | F | + | | G | + | | H | | -1 | I | + | | K | | -1 | M | + | | P | = | | 33 | | (9) |
| | E | + | | F | + | | 2 | G | + | | I | + | | 2 | J | + | | K | + | | 2 | M | + | | N | + | | O | = | | 99 | | (10) |
| -1 | I | | -1 | J | | -1 | M | | -1 | N | = | | -33 | | (11) |
| | E | + | | F | + | | G | + | | H | + | | I | + | | J | + | | M | + | | N | = | | 66 | | (12) |
| | | | | F | + | | G | + | | J | + | | K | + | | M | + | | N | + | | O | + | | P | = | | 66 | | (16) |
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Subtract both sides of equation (5) from both sides of equation (10) ,the equations are reduced to:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | + | | M | + | | N | = | | 33 | | (3) |
| -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | + | | K | + | | M | + | | N | + | | O | = | | 66 | | (4) |
| | | | | I | + | | J | + | | K | + | | L | + | | M | + | | N | + | | O | + | | P | = | | 66 | | (8) |
| | 2 | F | + | | G | + | | H | | -1 | I | + | | K | | -1 | M | + | | P | = | | 33 | | (9) |
| | G | | -1 | H | + | | I | + | | 2 | J | + | | K | + | | 2 | M | + | | N | + | | O | = | | 66 | | (10) |
| -1 | I | | -1 | J | | -1 | M | | -1 | N | = | | -33 | | (11) |
| | E | + | | F | + | | G | + | | H | + | | I | + | | J | + | | M | + | | N | = | | 66 | | (12) |
| | | | | F | + | | G | + | | J | + | | K | + | | M | + | | N | + | | O | + | | P | = | | 66 | | (16) |
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Subtract both sides of equation (5) from both sides of equation (12) ,the equations are reduced to:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | + | | M | + | | N | = | | 33 | | (3) |
| -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | + | | K | + | | M | + | | N | + | | O | = | | 66 | | (4) |
| | | | | I | + | | J | + | | K | + | | L | + | | M | + | | N | + | | O | + | | P | = | | 66 | | (8) |
| | 2 | F | + | | G | + | | H | | -1 | I | + | | K | | -1 | M | + | | P | = | | 33 | | (9) |
| | G | | -1 | H | + | | I | + | | 2 | J | + | | K | + | | 2 | M | + | | N | + | | O | = | | 66 | | (10) |
| -1 | I | | -1 | J | | -1 | M | | -1 | N | = | | -33 | | (11) |
| | | | | | F | + | | G | + | | J | + | | K | + | | M | + | | N | + | | O | + | | P | = | | 66 | | (16) |
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交After the exchange of equation (6) and equation (9), the equation system becomes:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | + | | M | + | | N | = | | 33 | | (3) |
| -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | + | | K | + | | M | + | | N | + | | O | = | | 66 | | (4) |
| | | 2 | F | + | | G | + | | H | | -1 | I | + | | K | | -1 | M | + | | P | = | | 33 | | (6) |
| | | I | + | | J | + | | K | + | | L | + | | M | + | | N | + | | O | + | | P | = | | 66 | | (8) |
| | | G | | -1 | H | + | | I | + | | 2 | J | + | | K | + | | 2 | M | + | | N | + | | O | = | | 66 | | (10) |
| -1 | I | | -1 | J | | -1 | M | | -1 | N | = | | -33 | | (11) |
| | | | | | F | + | | G | + | | J | + | | K | + | | M | + | | N | + | | O | + | | P | = | | 66 | | (16) |
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Divide the two sides of equation (6) by 2, the equation can be obtained: | | F | + | | | 1 2 | G | + | | | 1 2 | H | | - | 1 2 | I | + | | | 1 2 | K | | - | 1 2 | M | + | | | 1 2 | P | = | | | 33 2 | (17) | , then subtract both sides of equation (17) from both sides of equation (15), the equations are reduced to:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | + | | M | + | | N | = | | 33 | | (3) |
| -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | + | | K | + | | M | + | | N | + | | O | = | | 66 | | (4) |
| | | 2 | F | + | | G | + | | H | | -1 | I | + | | K | | -1 | M | + | | P | = | | 33 | | (6) |
| | | I | + | | J | + | | K | + | | L | + | | M | + | | N | + | | O | + | | P | = | | 66 | | (8) |
| | | G | | -1 | H | + | | I | + | | 2 | J | + | | K | + | | 2 | M | + | | N | + | | O | = | | 66 | | (10) |
| -1 | I | | -1 | J | | -1 | M | | -1 | N | = | | -33 | | (11) |
| | | | | | 1 2 | G | | - | 1 2 | H | + | | | 1 2 | I | + | | J | + | | | 1 2 | K | + | | | 1 2 | M | | - | 1 2 | P | = | | | 33 2 | | (15) |
| | F | + | | G | + | | J | + | | K | + | | M | + | | N | + | | O | + | | P | = | | 66 | | (16) |
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Divide the two sides of equation (6) by 2, the equation can be obtained: | | F | + | | | 1 2 | G | + | | | 1 2 | H | | - | 1 2 | I | + | | | 1 2 | K | | - | 1 2 | M | + | | | 1 2 | P | = | | | 33 2 | (18) | , then subtract both sides of equation (18) from both sides of equation (16), the equations are reduced to:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | + | | M | + | | N | = | | 33 | | (3) |
| -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | + | | K | + | | M | + | | N | + | | O | = | | 66 | | (4) |
| | | 2 | F | + | | G | + | | H | | -1 | I | + | | K | | -1 | M | + | | P | = | | 33 | | (6) |
| | | I | + | | J | + | | K | + | | L | + | | M | + | | N | + | | O | + | | P | = | | 66 | | (8) |
| | | G | | -1 | H | + | | I | + | | 2 | J | + | | K | + | | 2 | M | + | | N | + | | O | = | | 66 | | (10) |
| -1 | I | | -1 | J | | -1 | M | | -1 | N | = | | -33 | | (11) |
| | | | | | 1 2 | G | | - | 1 2 | H | + | | | 1 2 | I | + | | J | + | | | 1 2 | K | + | | | 1 2 | M | | - | 1 2 | P | = | | | 33 2 | | (15) |
| | | 1 2 | G | | - | 1 2 | H | + | | | 1 2 | I | + | | J | + | | | 1 2 | K | + | | | 3 2 | M | + | | N | + | | O | + | | | 1 2 | P | = | | | 99 2 | | (16) |
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交After the exchange of equation (7) and equation (10), the equation system becomes:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | + | | M | + | | N | = | | 33 | | (3) |
| -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | + | | K | + | | M | + | | N | + | | O | = | | 66 | | (4) |
| | | 2 | F | + | | G | + | | H | | -1 | I | + | | K | | -1 | M | + | | P | = | | 33 | | (6) |
| | G | | -1 | H | + | | I | + | | 2 | J | + | | K | + | | 2 | M | + | | N | + | | O | = | | 66 | | (7) |
| | I | + | | J | + | | K | + | | L | + | | M | + | | N | + | | O | + | | P | = | | 66 | | (8) |
| | | -1 | I | | -1 | J | | -1 | M | | -1 | N | = | | -33 | | (11) |
| | | | | | 1 2 | G | | - | 1 2 | H | + | | | 1 2 | I | + | | J | + | | | 1 2 | K | + | | | 1 2 | M | | - | 1 2 | P | = | | | 33 2 | | (15) |
| | | 1 2 | G | | - | 1 2 | H | + | | | 1 2 | I | + | | J | + | | | 1 2 | K | + | | | 3 2 | M | + | | N | + | | O | + | | | 1 2 | P | = | | | 99 2 | | (16) |
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Divide the two sides of equation (7) by 2, the equation can be obtained: | | | 1 2 | G | | - | 1 2 | H | + | | | 1 2 | I | + | | J | + | | | 1 2 | K | + | | M | + | | | 1 2 | N | + | | | 1 2 | O | = | | 33 | (19) | , then subtract both sides of equation (19) from both sides of equation (15), the equations are reduced to:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | + | | M | + | | N | = | | 33 | | (3) |
| -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | + | | K | + | | M | + | | N | + | | O | = | | 66 | | (4) |
| | | 2 | F | + | | G | + | | H | | -1 | I | + | | K | | -1 | M | + | | P | = | | 33 | | (6) |
| | G | | -1 | H | + | | I | + | | 2 | J | + | | K | + | | 2 | M | + | | N | + | | O | = | | 66 | | (7) |
| | I | + | | J | + | | K | + | | L | + | | M | + | | N | + | | O | + | | P | = | | 66 | | (8) |
| | | -1 | I | | -1 | J | | -1 | M | | -1 | N | = | | -33 | | (11) |
| | | | - | 1 2 | M | | - | 1 2 | N | | - | 1 2 | O | | - | 1 2 | P | = | | - | 33 2 | | (15) |
| | | 1 2 | G | | - | 1 2 | H | + | | | 1 2 | I | + | | J | + | | | 1 2 | K | + | | | 3 2 | M | + | | N | + | | O | + | | | 1 2 | P | = | | | 99 2 | | (16) |
|
Divide the two sides of equation (7) by 2, the equation can be obtained: | | | 1 2 | G | | - | 1 2 | H | + | | | 1 2 | I | + | | J | + | | | 1 2 | K | + | | M | + | | | 1 2 | N | + | | | 1 2 | O | = | | 33 | (20) | , then subtract both sides of equation (20) from both sides of equation (16), the equations are reduced to:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | + | | M | + | | N | = | | 33 | | (3) |
| -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | + | | K | + | | M | + | | N | + | | O | = | | 66 | | (4) |
| | | 2 | F | + | | G | + | | H | | -1 | I | + | | K | | -1 | M | + | | P | = | | 33 | | (6) |
| | G | | -1 | H | + | | I | + | | 2 | J | + | | K | + | | 2 | M | + | | N | + | | O | = | | 66 | | (7) |
| | I | + | | J | + | | K | + | | L | + | | M | + | | N | + | | O | + | | P | = | | 66 | | (8) |
| | | -1 | I | | -1 | J | | -1 | M | | -1 | N | = | | -33 | | (11) |
| | | | - | 1 2 | M | | - | 1 2 | N | | - | 1 2 | O | | - | 1 2 | P | = | | - | 33 2 | | (15) |
| | | 1 2 | M | + | | | 1 2 | N | + | | | 1 2 | O | + | | | 1 2 | P | = | | | 33 2 | | (16) |
|
Subtract both sides of equation (8) from both sides of equation (9) ,the equations are reduced to:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | + | | M | + | | N | = | | 33 | | (3) |
| -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | + | | K | + | | M | + | | N | + | | O | = | | 66 | | (4) |
| | | 2 | F | + | | G | + | | H | | -1 | I | + | | K | | -1 | M | + | | P | = | | 33 | | (6) |
| | G | | -1 | H | + | | I | + | | 2 | J | + | | K | + | | 2 | M | + | | N | + | | O | = | | 66 | | (7) |
| | I | + | | J | + | | K | + | | L | + | | M | + | | N | + | | O | + | | P | = | | 66 | | (8) |
| -1 | M | | -1 | N | | -1 | O | | -1 | P | = | | -33 | | (9) |
| | -1 | I | | -1 | J | | -1 | M | | -1 | N | = | | -33 | | (11) |
| | | | - | 1 2 | M | | - | 1 2 | N | | - | 1 2 | O | | - | 1 2 | P | = | | - | 33 2 | | (15) |
| | | 1 2 | M | + | | | 1 2 | N | + | | | 1 2 | O | + | | | 1 2 | P | = | | | 33 2 | | (16) |
|
Add both sides of equation (8) to both sides of equation (11) ,the equations are reduced to:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | + | | M | + | | N | = | | 33 | | (3) |
| -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | + | | K | + | | M | + | | N | + | | O | = | | 66 | | (4) |
| | | 2 | F | + | | G | + | | H | | -1 | I | + | | K | | -1 | M | + | | P | = | | 33 | | (6) |
| | G | | -1 | H | + | | I | + | | 2 | J | + | | K | + | | 2 | M | + | | N | + | | O | = | | 66 | | (7) |
| | I | + | | J | + | | K | + | | L | + | | M | + | | N | + | | O | + | | P | = | | 66 | | (8) |
| -1 | M | | -1 | N | | -1 | O | | -1 | P | = | | -33 | | (9) |
| | | | | | - | 1 2 | M | | - | 1 2 | N | | - | 1 2 | O | | - | 1 2 | P | = | | - | 33 2 | | (15) |
| | | 1 2 | M | + | | | 1 2 | N | + | | | 1 2 | O | + | | | 1 2 | P | = | | | 33 2 | | (16) |
|
Subtract both sides of equation (8) from both sides of equation (12) ,the equations are reduced to:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | + | | M | + | | N | = | | 33 | | (3) |
| -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | + | | K | + | | M | + | | N | + | | O | = | | 66 | | (4) |
| | | 2 | F | + | | G | + | | H | | -1 | I | + | | K | | -1 | M | + | | P | = | | 33 | | (6) |
| | G | | -1 | H | + | | I | + | | 2 | J | + | | K | + | | 2 | M | + | | N | + | | O | = | | 66 | | (7) |
| | I | + | | J | + | | K | + | | L | + | | M | + | | N | + | | O | + | | P | = | | 66 | | (8) |
| -1 | M | | -1 | N | | -1 | O | | -1 | P | = | | -33 | | (9) |
| | | -1 | K | | -1 | L | | -1 | O | | -1 | P | = | | -33 | | (12) |
| | | - | 1 2 | M | | - | 1 2 | N | | - | 1 2 | O | | - | 1 2 | P | = | | - | 33 2 | | (15) |
| | | 1 2 | M | + | | | 1 2 | N | + | | | 1 2 | O | + | | | 1 2 | P | = | | | 33 2 | | (16) |
|
Subtract both sides of equation (8) from both sides of equation (13) ,the equations are reduced to:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | + | | M | + | | N | = | | 33 | | (3) |
| -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | + | | K | + | | M | + | | N | + | | O | = | | 66 | | (4) |
| | | 2 | F | + | | G | + | | H | | -1 | I | + | | K | | -1 | M | + | | P | = | | 33 | | (6) |
| | G | | -1 | H | + | | I | + | | 2 | J | + | | K | + | | 2 | M | + | | N | + | | O | = | | 66 | | (7) |
| | I | + | | J | + | | K | + | | L | + | | M | + | | N | + | | O | + | | P | = | | 66 | | (8) |
| -1 | M | | -1 | N | | -1 | O | | -1 | P | = | | -33 | | (9) |
| | | -1 | K | | -1 | L | | -1 | O | | -1 | P | = | | -33 | | (12) |
| -1 | K | | -1 | L | | -1 | O | | -1 | P | = | | -33 | | (13) |
| | - | 1 2 | M | | - | 1 2 | N | | - | 1 2 | O | | - | 1 2 | P | = | | - | 33 2 | | (15) |
| | | 1 2 | M | + | | | 1 2 | N | + | | | 1 2 | O | + | | | 1 2 | P | = | | | 33 2 | | (16) |
|
交After the exchange of equation (9) and equation (11), the equation system becomes:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | + | | M | + | | N | = | | 33 | | (3) |
| -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | + | | K | + | | M | + | | N | + | | O | = | | 66 | | (4) |
| | | 2 | F | + | | G | + | | H | | -1 | I | + | | K | | -1 | M | + | | P | = | | 33 | | (6) |
| | G | | -1 | H | + | | I | + | | 2 | J | + | | K | + | | 2 | M | + | | N | + | | O | = | | 66 | | (7) |
| | I | + | | J | + | | K | + | | L | + | | M | + | | N | + | | O | + | | P | = | | 66 | | (8) |
| | | -1 | M | | -1 | N | | -1 | O | | -1 | P | = | | -33 | | (11) |
| -1 | K | | -1 | L | | -1 | O | | -1 | P | = | | -33 | | (12) |
| -1 | K | | -1 | L | | -1 | O | | -1 | P | = | | -33 | | (13) |
| | - | 1 2 | M | | - | 1 2 | N | | - | 1 2 | O | | - | 1 2 | P | = | | - | 33 2 | | (15) |
| | | 1 2 | M | + | | | 1 2 | N | + | | | 1 2 | O | + | | | 1 2 | P | = | | | 33 2 | | (16) |
|
Add both sides of equation (9) to both sides of equation (12) ,the equations are reduced to:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | + | | M | + | | N | = | | 33 | | (3) |
| -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | + | | K | + | | M | + | | N | + | | O | = | | 66 | | (4) |
| | | 2 | F | + | | G | + | | H | | -1 | I | + | | K | | -1 | M | + | | P | = | | 33 | | (6) |
| | G | | -1 | H | + | | I | + | | 2 | J | + | | K | + | | 2 | M | + | | N | + | | O | = | | 66 | | (7) |
| | I | + | | J | + | | K | + | | L | + | | M | + | | N | + | | O | + | | P | = | | 66 | | (8) |
| | | -1 | M | | -1 | N | | -1 | O | | -1 | P | = | | -33 | | (11) |
| | -1 | K | | -1 | L | | -1 | O | | -1 | P | = | | -33 | | (13) |
| | - | 1 2 | M | | - | 1 2 | N | | - | 1 2 | O | | - | 1 2 | P | = | | - | 33 2 | | (15) |
| | | 1 2 | M | + | | | 1 2 | N | + | | | 1 2 | O | + | | | 1 2 | P | = | | | 33 2 | | (16) |
|
Add both sides of equation (9) to both sides of equation (13) ,the equations are reduced to:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | + | | M | + | | N | = | | 33 | | (3) |
| -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | + | | K | + | | M | + | | N | + | | O | = | | 66 | | (4) |
| | | 2 | F | + | | G | + | | H | | -1 | I | + | | K | | -1 | M | + | | P | = | | 33 | | (6) |
| | G | | -1 | H | + | | I | + | | 2 | J | + | | K | + | | 2 | M | + | | N | + | | O | = | | 66 | | (7) |
| | I | + | | J | + | | K | + | | L | + | | M | + | | N | + | | O | + | | P | = | | 66 | | (8) |
| | | -1 | M | | -1 | N | | -1 | O | | -1 | P | = | | -33 | | (11) |
| | | | - | 1 2 | M | | - | 1 2 | N | | - | 1 2 | O | | - | 1 2 | P | = | | - | 33 2 | | (15) |
| | | 1 2 | M | + | | | 1 2 | N | + | | | 1 2 | O | + | | | 1 2 | P | = | | | 33 2 | | (16) |
|
Subtract both sides of equation (9) from both sides of equation (14) ,the equations are reduced to:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | + | | M | + | | N | = | | 33 | | (3) |
| -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | + | | K | + | | M | + | | N | + | | O | = | | 66 | | (4) |
| | | 2 | F | + | | G | + | | H | | -1 | I | + | | K | | -1 | M | + | | P | = | | 33 | | (6) |
| | G | | -1 | H | + | | I | + | | 2 | J | + | | K | + | | 2 | M | + | | N | + | | O | = | | 66 | | (7) |
| | I | + | | J | + | | K | + | | L | + | | M | + | | N | + | | O | + | | P | = | | 66 | | (8) |
| | | -1 | M | | -1 | N | | -1 | O | | -1 | P | = | | -33 | | (11) |
| | | | - | 1 2 | M | | - | 1 2 | N | | - | 1 2 | O | | - | 1 2 | P | = | | - | 33 2 | | (15) |
| | | 1 2 | M | + | | | 1 2 | N | + | | | 1 2 | O | + | | | 1 2 | P | = | | | 33 2 | | (16) |
|
Add both sides of equation (10) to both sides of equation (11) ,the equations are reduced to:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | + | | M | + | | N | = | | 33 | | (3) |
| -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | + | | K | + | | M | + | | N | + | | O | = | | 66 | | (4) |
| | | 2 | F | + | | G | + | | H | | -1 | I | + | | K | | -1 | M | + | | P | = | | 33 | | (6) |
| | G | | -1 | H | + | | I | + | | 2 | J | + | | K | + | | 2 | M | + | | N | + | | O | = | | 66 | | (7) |
| | I | + | | J | + | | K | + | | L | + | | M | + | | N | + | | O | + | | P | = | | 66 | | (8) |
| | | | | | | - | 1 2 | M | | - | 1 2 | N | | - | 1 2 | O | | - | 1 2 | P | = | | - | 33 2 | | (15) |
| | | 1 2 | M | + | | | 1 2 | N | + | | | 1 2 | O | + | | | 1 2 | P | = | | | 33 2 | | (16) |
|
Divide the two sides of equation (10) by 2, the equation can be obtained: | | | 1 2 | M | + | | | 1 2 | N | + | | | 1 2 | O | + | | | 1 2 | P | = | | | 33 2 | (21) | , then add the two sides of equation (21) to both sides of equation (15), the equations are reduced to:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | + | | M | + | | N | = | | 33 | | (3) |
| -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | + | | K | + | | M | + | | N | + | | O | = | | 66 | | (4) |
| | | 2 | F | + | | G | + | | H | | -1 | I | + | | K | | -1 | M | + | | P | = | | 33 | | (6) |
| | G | | -1 | H | + | | I | + | | 2 | J | + | | K | + | | 2 | M | + | | N | + | | O | = | | 66 | | (7) |
| | I | + | | J | + | | K | + | | L | + | | M | + | | N | + | | O | + | | P | = | | 66 | | (8) |
| | | | | | | | | | 1 2 | M | + | | | 1 2 | N | + | | | 1 2 | O | + | | | 1 2 | P | = | | | 33 2 | | (16) |
|
Divide the two sides of equation (10) by 2, the equation can be obtained: | | | 1 2 | M | + | | | 1 2 | N | + | | | 1 2 | O | + | | | 1 2 | P | = | | | 33 2 | (22) | , then subtract both sides of equation (22) from both sides of equation (16), the equations are reduced to:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | + | | M | + | | N | = | | 33 | | (3) |
| -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | + | | K | + | | M | + | | N | + | | O | = | | 66 | | (4) |
| | | 2 | F | + | | G | + | | H | | -1 | I | + | | K | | -1 | M | + | | P | = | | 33 | | (6) |
| | G | | -1 | H | + | | I | + | | 2 | J | + | | K | + | | 2 | M | + | | N | + | | O | = | | 66 | | (7) |
| | I | + | | J | + | | K | + | | L | + | | M | + | | N | + | | O | + | | P | = | | 66 | | (8) |
| | | | | | | | |
Subtract both sides of equation (10) from both sides of equation (8), get the equation:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | + | | M | + | | N | = | | 33 | | (3) |
| -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | + | | K | + | | M | + | | N | + | | O | = | | 66 | | (4) |
| | | 2 | F | + | | G | + | | H | | -1 | I | + | | K | | -1 | M | + | | P | = | | 33 | | (6) |
| | G | | -1 | H | + | | I | + | | 2 | J | + | | K | + | | 2 | M | + | | N | + | | O | = | | 66 | | (7) |
| | | | | | | | | |
Multiply both sides of equation (10) by 2, get the equation: | | 2 | M | + | | 2 | N | + | | 2 | O | + | | 2 | P | = | | 66 | (23) | , then subtract both sides of equation (23) from both sides of equation (7), get the equation:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | + | | M | + | | N | = | | 33 | | (3) |
| -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | + | | K | + | | M | + | | N | + | | O | = | | 66 | | (4) |
| | | 2 | F | + | | G | + | | H | | -1 | I | + | | K | | -1 | M | + | | P | = | | 33 | | (6) |
| | G | | -1 | H | + | | I | + | | 2 | J | + | | K | | -1 | N | | -1 | O | | -2 | P | = | | 0 | | (7) |
| | | | | | | | | |
Add both sides of equation (10) to both sides of equation (6), get the equation:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | + | | M | + | | N | = | | 33 | | (3) |
| -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | + | | K | + | | M | + | | N | + | | O | = | | 66 | | (4) |
| | | 2 | F | + | | G | + | | H | | -1 | I | + | | K | + | | N | + | | O | + | | 2 | P | = | | 66 | | (6) |
| | G | | -1 | H | + | | I | + | | 2 | J | + | | K | | -1 | N | | -1 | O | | -2 | P | = | | 0 | | (7) |
| | | | | | | | | |
Subtract both sides of equation (10) from both sides of equation (4), get the equation:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | + | | M | + | | N | = | | 33 | | (3) |
| -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | + | | K | | -1 | P | = | | 33 | | (4) |
| | | 2 | F | + | | G | + | | H | | -1 | I | + | | K | + | | N | + | | O | + | | 2 | P | = | | 66 | | (6) |
| | G | | -1 | H | + | | I | + | | 2 | J | + | | K | | -1 | N | | -1 | O | | -2 | P | = | | 0 | | (7) |
| | | | | | | | | |
Subtract both sides of equation (10) from both sides of equation (3), get the equation:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | + | | M | = | | 0 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | | -1 | O | | -1 | P | = | | 0 | | (3) |
| -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | + | | K | | -1 | P | = | | 33 | | (4) |
| | | 2 | F | + | | G | + | | H | | -1 | I | + | | K | + | | N | + | | O | + | | 2 | P | = | | 66 | | (6) |
| | G | | -1 | H | + | | I | + | | 2 | J | + | | K | | -1 | N | | -1 | O | | -2 | P | = | | 0 | | (7) |
| | | | | | | | | |
Subtract both sides of equation (10) from both sides of equation (2), get the equation:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | | -1 | N | | -1 | O | | -1 | P | = | | -33 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | | -1 | O | | -1 | P | = | | 0 | | (3) |
| -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | + | | K | | -1 | P | = | | 33 | | (4) |
| | | 2 | F | + | | G | + | | H | | -1 | I | + | | K | + | | N | + | | O | + | | 2 | P | = | | 66 | | (6) |
| | G | | -1 | H | + | | I | + | | 2 | J | + | | K | | -1 | N | | -1 | O | | -2 | P | = | | 0 | | (7) |
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Subtract both sides of equation (9) from both sides of equation (8), get the equation:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | | -1 | N | | -1 | O | | -1 | P | = | | -33 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | | -1 | O | | -1 | P | = | | 0 | | (3) |
| -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | + | | K | | -1 | P | = | | 33 | | (4) |
| | | 2 | F | + | | G | + | | H | | -1 | I | + | | K | + | | N | + | | O | + | | 2 | P | = | | 66 | | (6) |
| | G | | -1 | H | + | | I | + | | 2 | J | + | | K | | -1 | N | | -1 | O | | -2 | P | = | | 0 | | (7) |
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Subtract both sides of equation (9) from both sides of equation (7), get the equation:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | | -1 | N | | -1 | O | | -1 | P | = | | -33 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | | -1 | O | | -1 | P | = | | 0 | | (3) |
| -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | + | | K | | -1 | P | = | | 33 | | (4) |
| | | 2 | F | + | | G | + | | H | | -1 | I | + | | K | + | | N | + | | O | + | | 2 | P | = | | 66 | | (6) |
| | G | | -1 | H | + | | I | + | | 2 | J | | -1 | L | | -1 | N | | -2 | O | | -3 | P | = | | -33 | | (7) |
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Subtract both sides of equation (9) from both sides of equation (6), get the equation:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | | -1 | N | | -1 | O | | -1 | P | = | | -33 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | | -1 | O | | -1 | P | = | | 0 | | (3) |
| -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | + | | K | | -1 | P | = | | 33 | | (4) |
| | | 2 | F | + | | G | + | | H | | -1 | I | | -1 | L | + | | N | + | | P | = | | 33 | | (6) |
| | G | | -1 | H | + | | I | + | | 2 | J | | -1 | L | | -1 | N | | -2 | O | | -3 | P | = | | -33 | | (7) |
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Subtract both sides of equation (9) from both sides of equation (4), get the equation:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | | -1 | N | | -1 | O | | -1 | P | = | | -33 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | | -1 | O | | -1 | P | = | | 0 | | (3) |
| -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | | -1 | L | | -1 | O | | -2 | P | = | | 0 | | (4) |
| | | 2 | F | + | | G | + | | H | | -1 | I | | -1 | L | + | | N | + | | P | = | | 33 | | (6) |
| | G | | -1 | H | + | | I | + | | 2 | J | | -1 | L | | -1 | N | | -2 | O | | -3 | P | = | | -33 | | (7) |
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Subtract both sides of equation (8) from both sides of equation (7), get the equation:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | | -1 | N | | -1 | O | | -1 | P | = | | -33 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | | -1 | O | | -1 | P | = | | 0 | | (3) |
| -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | | -1 | L | | -1 | O | | -2 | P | = | | 0 | | (4) |
| | | 2 | F | + | | G | + | | H | | -1 | I | | -1 | L | + | | N | + | | P | = | | 33 | | (6) |
| | G | | -1 | H | + | | J | | -1 | L | | -1 | N | | -1 | O | | -2 | P | = | | -33 | | (7) |
| | | | | | | | | |
Add both sides of equation (8) to both sides of equation (6), get the equation:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | | -1 | N | | -1 | O | | -1 | P | = | | -33 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | | -1 | O | | -1 | P | = | | 0 | | (3) |
| -1 | D | + | | E | + | | F | + | | G | + | | I | + | | J | | -1 | L | | -1 | O | | -2 | P | = | | 0 | | (4) |
| | | 2 | F | + | | G | + | | H | + | | J | | -1 | L | + | | N | | -1 | O | = | | 33 | | (6) |
| | G | | -1 | H | + | | J | | -1 | L | | -1 | N | | -1 | O | | -2 | P | = | | -33 | | (7) |
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Subtract both sides of equation (8) from both sides of equation (4), get the equation:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | | -1 | N | | -1 | O | | -1 | P | = | | -33 | | (2) |
| -1 | C | | -1 | D | + | | E | + | | F | + | | I | + | | J | | -1 | O | | -1 | P | = | | 0 | | (3) |
| -1 | D | + | | E | + | | F | + | | G | | -1 | L | | -1 | P | = | | 0 | | (4) |
| | | 2 | F | + | | G | + | | H | + | | J | | -1 | L | + | | N | | -1 | O | = | | 33 | | (6) |
| | G | | -1 | H | + | | J | | -1 | L | | -1 | N | | -1 | O | | -2 | P | = | | -33 | | (7) |
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Subtract both sides of equation (8) from both sides of equation (3), get the equation:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | + | | I | | -1 | N | | -1 | O | | -1 | P | = | | -33 | | (2) |
| | -1 | D | + | | E | + | | F | + | | G | | -1 | L | | -1 | P | = | | 0 | | (4) |
| | | 2 | F | + | | G | + | | H | + | | J | | -1 | L | + | | N | | -1 | O | = | | 33 | | (6) |
| | G | | -1 | H | + | | J | | -1 | L | | -1 | N | | -1 | O | | -2 | P | = | | -33 | | (7) |
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Subtract both sides of equation (8) from both sides of equation (2), get the equation:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | | -1 | J | | -1 | N | = | | -33 | | (2) |
| | -1 | D | + | | E | + | | F | + | | G | | -1 | L | | -1 | P | = | | 0 | | (4) |
| | | 2 | F | + | | G | + | | H | + | | J | | -1 | L | + | | N | | -1 | O | = | | 33 | | (6) |
| | G | | -1 | H | + | | J | | -1 | L | | -1 | N | | -1 | O | | -2 | P | = | | -33 | | (7) |
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Subtract both sides of equation (7) from both sides of equation (6), get the equation:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | | -1 | J | | -1 | N | = | | -33 | | (2) |
| | -1 | D | + | | E | + | | F | + | | G | | -1 | L | | -1 | P | = | | 0 | | (4) |
| | | 2 | F | + | | 2 | H | + | | 2 | N | + | | 2 | P | = | | 66 | | (6) |
| | G | | -1 | H | + | | J | | -1 | L | | -1 | N | | -1 | O | | -2 | P | = | | -33 | | (7) |
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Subtract both sides of equation (7) from both sides of equation (5), get the equation:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | | -1 | J | | -1 | N | = | | -33 | | (2) |
| | -1 | D | + | | E | + | | F | + | | G | | -1 | L | | -1 | P | = | | 0 | | (4) |
| | E | + | | F | + | | 2 | H | | -1 | J | + | | L | + | | N | + | | O | + | | 2 | P | = | | 66 | | (5) |
| | 2 | F | + | | 2 | H | + | | 2 | N | + | | 2 | P | = | | 66 | | (6) |
| | G | | -1 | H | + | | J | | -1 | L | | -1 | N | | -1 | O | | -2 | P | = | | -33 | | (7) |
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Subtract both sides of equation (7) from both sides of equation (4), get the equation:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | | -1 | J | | -1 | N | = | | -33 | | (2) |
| | -1 | D | + | | E | + | | F | + | | H | | -1 | J | + | | N | + | | O | + | | P | = | | 33 | | (4) |
| | E | + | | F | + | | 2 | H | | -1 | J | + | | L | + | | N | + | | O | + | | 2 | P | = | | 66 | | (5) |
| | 2 | F | + | | 2 | H | + | | 2 | N | + | | 2 | P | = | | 66 | | (6) |
| | G | | -1 | H | + | | J | | -1 | L | | -1 | N | | -1 | O | | -2 | P | = | | -33 | | (7) |
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Divide both sides of equation (6) by 2, get the equation:, then subtract both sides of equation (24) from both sides of equation (5), get the equation:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | | -1 | J | | -1 | N | = | | -33 | | (2) |
| | -1 | D | + | | E | + | | F | + | | H | | -1 | J | + | | N | + | | O | + | | P | = | | 33 | | (4) |
| | E | + | | H | | -1 | J | + | | L | + | | O | + | | P | = | | 33 | | (5) |
| | 2 | F | + | | 2 | H | + | | 2 | N | + | | 2 | P | = | | 66 | | (6) |
| | G | | -1 | H | + | | J | | -1 | L | | -1 | N | | -1 | O | | -2 | P | = | | -33 | | (7) |
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Divide both sides of equation (6) by 2, get the equation:, then subtract both sides of equation (25) from both sides of equation (4), get the equation:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | | -1 | J | | -1 | N | = | | -33 | | (2) |
| | | | E | + | | H | | -1 | J | + | | L | + | | O | + | | P | = | | 33 | | (5) |
| | 2 | F | + | | 2 | H | + | | 2 | N | + | | 2 | P | = | | 66 | | (6) |
| | G | | -1 | H | + | | J | | -1 | L | | -1 | N | | -1 | O | | -2 | P | = | | -33 | | (7) |
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Divide both sides of equation (6) by 2, get the equation:, then subtract both sides of equation (26) from both sides of equation (3), get the equation:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | | -1 | J | | -1 | N | = | | -33 | | (2) |
| -1 | C | | -1 | D | + | | E | | -1 | H | | -1 | N | | -1 | P | = | | -33 | | (3) |
| | | E | + | | H | | -1 | J | + | | L | + | | O | + | | P | = | | 33 | | (5) |
| | 2 | F | + | | 2 | H | + | | 2 | N | + | | 2 | P | = | | 66 | | (6) |
| | G | | -1 | H | + | | J | | -1 | L | | -1 | N | | -1 | O | | -2 | P | = | | -33 | | (7) |
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Subtract both sides of equation (5) from both sides of equation (4), get the equation:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | | -1 | J | | -1 | N | = | | -33 | | (2) |
| -1 | C | | -1 | D | + | | E | | -1 | H | | -1 | N | | -1 | P | = | | -33 | | (3) |
| -1 | D | | -1 | H | | -1 | L | | -1 | P | = | | -33 | | (4) |
| | E | + | | H | | -1 | J | + | | L | + | | O | + | | P | = | | 33 | | (5) |
| | | G | | -1 | H | + | | J | | -1 | L | | -1 | N | | -1 | O | | -2 | P | = | | -33 | | (7) |
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Subtract both sides of equation (5) from both sides of equation (3), get the equation:
 | | | | -1 | B | | -1 | C | | -1 | D | + | | E | | -1 | J | | -1 | N | = | | -33 | | (2) |
| -1 | C | | -1 | D | | -2 | H | + | | J | | -1 | L | | -1 | N | | -1 | O | | -2 | P | = | | -66 | | (3) |
| -1 | D | | -1 | H | | -1 | L | | -1 | P | = | | -33 | | (4) |
| | E | + | | H | | -1 | J | + | | L | + | | O | + | | P | = | | 33 | | (5) |
| | | G | | -1 | H | + | | J | | -1 | L | | -1 | N | | -1 | O | | -2 | P | = | | -33 | | (7) |
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Subtract both sides of equation (5) from both sides of equation (2), get the equation:
 | | | | -1 | B | | -1 | C | | -1 | D | | -1 | H | | -1 | L | | -1 | N | | -1 | O | | -1 | P | = | | -66 | | (2) |
| -1 | C | | -1 | D | | -2 | H | + | | J | | -1 | L | | -1 | N | | -1 | O | | -2 | P | = | | -66 | | (3) |
| -1 | D | | -1 | H | | -1 | L | | -1 | P | = | | -33 | | (4) |
| | E | + | | H | | -1 | J | + | | L | + | | O | + | | P | = | | 33 | | (5) |
| | | G | | -1 | H | + | | J | | -1 | L | | -1 | N | | -1 | O | | -2 | P | = | | -33 | | (7) |
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Subtract both sides of equation (4) from both sides of equation (3), get the equation:
 | | | | -1 | B | | -1 | C | | -1 | D | | -1 | H | | -1 | L | | -1 | N | | -1 | O | | -1 | P | = | | -66 | | (2) |
| -1 | C | | -1 | H | + | | J | | -1 | N | | -1 | O | | -1 | P | = | | -33 | | (3) |
| -1 | D | | -1 | H | | -1 | L | | -1 | P | = | | -33 | | (4) |
| | E | + | | H | | -1 | J | + | | L | + | | O | + | | P | = | | 33 | | (5) |
| | | G | | -1 | H | + | | J | | -1 | L | | -1 | N | | -1 | O | | -2 | P | = | | -33 | | (7) |
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Subtract both sides of equation (4) from both sides of equation (2), get the equation:
 | | | | -1 | B | | -1 | C | | -1 | N | | -1 | O | = | | -33 | | (2) |
| -1 | C | | -1 | H | + | | J | | -1 | N | | -1 | O | | -1 | P | = | | -33 | | (3) |
| -1 | D | | -1 | H | | -1 | L | | -1 | P | = | | -33 | | (4) |
| | E | + | | H | | -1 | J | + | | L | + | | O | + | | P | = | | 33 | | (5) |
| | | G | | -1 | H | + | | J | | -1 | L | | -1 | N | | -1 | O | | -2 | P | = | | -33 | | (7) |
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Add both sides of equation (4) to both sides of equation (1), get the equation:
 | | | | A | + | | B | + | | C | | -1 | H | | -1 | L | | -1 | P | = | | 0 | | (1) |
| -1 | B | | -1 | C | | -1 | N | | -1 | O | = | | -33 | | (2) |
| -1 | C | | -1 | H | + | | J | | -1 | N | | -1 | O | | -1 | P | = | | -33 | | (3) |
| -1 | D | | -1 | H | | -1 | L | | -1 | P | = | | -33 | | (4) |
| | E | + | | H | | -1 | J | + | | L | + | | O | + | | P | = | | 33 | | (5) |
| | | G | | -1 | H | + | | J | | -1 | L | | -1 | N | | -1 | O | | -2 | P | = | | -33 | | (7) |
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Subtract both sides of equation (3) from both sides of equation (2), get the equation:
 | | | | A | + | | B | + | | C | | -1 | H | | -1 | L | | -1 | P | = | | 0 | | (1) |
| | -1 | C | | -1 | H | + | | J | | -1 | N | | -1 | O | | -1 | P | = | | -33 | | (3) |
| | | E | + | | H | | -1 | J | + | | L | + | | O | + | | P | = | | 33 | | (5) |
| | | G | | -1 | H | + | | J | | -1 | L | | -1 | N | | -1 | O | | -2 | P | = | | -33 | | (7) |
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Add both sides of equation (3) to both sides of equation (1), get the equation:
 | | | | A | + | | B | | -2 | H | + | | J | | -1 | L | | -1 | N | | -1 | O | | -2 | P | = | | -33 | | (1) |
| | -1 | C | | -1 | H | + | | J | | -1 | N | | -1 | O | | -1 | P | = | | -33 | | (3) |
| | | E | + | | H | | -1 | J | + | | L | + | | O | + | | P | = | | 33 | | (5) |
| | | G | | -1 | H | + | | J | | -1 | L | | -1 | N | | -1 | O | | -2 | P | = | | -33 | | (7) |
| | | | | | | | | |
Add both sides of equation (2) to both sides of equation (1), get the equation:
 | | | | A | | -1 | H | | -1 | L | | -1 | N | | -1 | O | | -1 | P | = | | -33 | | (1) |
| | | C | + | | H | | -1 | J | + | | N | + | | O | + | | P | = | | 33 | | (3) |
| | | E | + | | H | | -1 | J | + | | L | + | | O | + | | P | = | | 33 | | (5) |
| | | G | | -1 | H | + | | J | | -1 | L | | -1 | N | | -1 | O | | -2 | P | = | | -33 | | (7) |
| | | | | | | | | |
The coefficient of the unknown number is reduced to 1, and the equations are reduced to:
 | | | | A | | -1 | H | | -1 | L | | -1 | N | | -1 | O | | -1 | P | = | | -33 | | (1) |
| | | C | + | | H | | -1 | J | + | | N | + | | O | + | | P | = | | 33 | | (3) |
| | | E | + | | H | | -1 | J | + | | L | + | | O | + | | P | = | | 33 | | (5) |
| | | G | | -1 | H | + | | J | | -1 | L | | -1 | N | | -1 | O | | -2 | P | = | | -33 | | (7) |
| | | | | | | | | |
Therefore, the solution of the equation set is:
 | | | A = | | -33 | + | | 1 | H | + | | 1 | L | + | | 1 | N | + | | 1 | O | + | | 1 | P |
| | C = | | 33 | - | | 1 | H | + | | 1 | J | - | | 1 | N | - | | 1 | O | - | | 1 | P |
| | E = | | 33 | - | | 1 | H | + | | 1 | J | - | | 1 | L | - | | 1 | O | - | | 1 | P |
| | G = | | -33 | + | | 1 | H | - | | 1 | J | + | | 1 | L | + | | 1 | N | + | | 1 | O | + | | 2 | P |
| | | |
Where: H, J, L, N, O, P are arbitrary constants. 解方程组的详细方法请参阅:《多元一次方程组的解法》 |