| 150 | x | + | 350 | ( | 160 | − | x | ) | = | 36000 |
| 方程左边 = | 150 | x | + | 350 | × | 160 | − | 350 | x |
| = | 150 | x | + | 56000 | − | 350 | x |
| = | - | 200 | x | + | 56000 |
| - | 200 | x | + | 56000 | = | 36000 |
| - | 200 | x | = | 36000 | − | 56000 |
| - | 200 | x | = | - | 20000 |
| 20000 | = | 200 | x |
| 200 | x | = | 20000 |
| x | = | 20000 | ÷ | 200 |
| = | 20000 | × | 1 200 |
| = | 100 | × | 1 |
| x | = | 100 |