| x | − | 2 | ( | x | − | 2 | ) | = | 3 | x | + | 5 | ( | x | − | 1 | ) |
| 方程左边 = | x | − | 2 | x | + | 2 | × | 2 |
| = | x | − | 2 | x | + | 4 |
| = | - | 1 | x | + | 4 |
| - | 1 | x | + | 4 | = | 3 | x | + | 5 | ( | x | − | 1 | ) |
| 方程右边 = | 3 | x | + | 5 | x | − | 5 | × | 1 |
| = | 3 | x | + | 5 | x | − | 5 |
| = | 8 | x | − | 5 |
| - | 1 | x | + | 4 | = | 8 | x | − | 5 |
| - | 1 | x | − | 8 | x | = | - | 5 | − | 4 |
| - | 9 | x | = | - | 5 | − | 4 |
| - | 9 | x | = | - | 9 |
| 9 | = | 9 | x |
| 9 | x | = | 9 |
| x | = | 9 | ÷ | 9 |
| = | 9 | × | 1 9 |
| = | 1 | × | 1 |
| x | = | 1 |