detailed information: The input equation set is: Question solving process:
交After the exchange of equation (1) and equation (2), the equation system becomes:
Divide the two sides of equation (1) by 2, the equation can be obtained: , then subtract both sides of equation (4) from both sides of equation (3), the equations are reduced to:
Multiply both sides of equation (2) by 6 Divide the two sides of equation (2) by 7, the equation can be obtained: , 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 273 Divide both sides of equation (3) by 241, get the equation: | - | 18798 241 | z | = | | - | 37752 241 | (6) | , then add the two sides of equation (6) to both sides of equation (2), get the equation:
Multiply both sides of equation (3) by 21 Divide both sides of equation (3) by 241, get the equation: | - | 1446 241 | z | = | | - | 2904 241 | (7) | , then add the two sides of equation (7) 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》 |