detailed information: The input equation set is: Question solving process:
Multiply both sides of equation (1) by 400, the equation can be obtained: , then subtract both sides of equation (4) from both sides of equation (2), the equations are reduced to:
Multiply both sides of equation (2) by 71 Divide the two sides of equation (2) by 70, the equation can be obtained: | | 710 | y | + | | | 2840 7 | z | = | | | 142 35 | (5) | , then subtract both sides of equation (5) from both sides of equation (3), the equations are reduced to:
Multiply both sides of equation (3) by 140 Divide both sides of equation (3) by 247, get the equation:, then add the two sides of equation (6) to both sides of equation (2), get the equation:
Multiply both sides of equation (3) by 7 Divide both sides of equation (3) by 4940, get the equation:, then subtract both sides of equation (7) from both sides of equation (1), get the equation:
Divide both sides of equation (2) by 700, get the equation:, then add the two sides of equation (8) to both sides of equation (1), get the equation:
The coefficient of the unknown number is reduced to 1, and the equations are reduced to:
Therefore, the solution of the equation set is:
Convert the solution of the equation set to decimals:
解方程组的详细方法请参阅:《多元一次方程组的解法》 |