57 100 | x | + | ( | 330 | − | x | ) | × | 29 100 | = | 1287 10 |
| 方程左边 = | 57 100 | x | + | 330 | × | 29 100 | − | x | × | 29 100 |
| = | 57 100 | x | + | 957 10 | − | x | × | 29 100 |
| = | 7 25 | x | + | 957 10 |
7 25 | x | + | 957 10 | = | 1287 10 |
7 25 | x | = | 1287 10 | − | 957 10 |
7 25 | x | = | 33 |
| x | = | 33 | ÷ | 7 25 |
| = | 33 | × | 25 7 |
| x | = | 825 7 |
| x | = | 117.857143 |