10 100 | x | + | 25 100 | ( | 1000 | − | x | ) | = | 20 100 | × | 600 |
| 方程左边 = | 10 100 | x | + | 25 100 | × | 1000 | − | 25 100 | x |
| = | 10 100 | x | + | 250 | − | 25 100 | x |
| = | - | 3 20 | x | + | 250 |
| - | 3 20 | x | + | 250 | = | 20 100 | × | 600 |
| 方程右边 = | 120 |
| - | 3 20 | x | + | 250 | = | 120 |
| - | 3 20 | x | = | 120 | − | 250 |
| - | 3 20 | x | = | - | 130 |
| 130 | = | 3 20 | x |
3 20 | x | = | 130 |
| x | = | 130 | ÷ | 3 20 |
| = | 130 | × | 20 3 |
| x | = | 2600 3 |
| x | = | 866.666667 |