| 2 | ( | x | − | 1 | ) | − | 6 | ( | x | − | 2 | ) | = | 3 | ( | 1 | − | x | ) |
| 方程左边 = | 2 | x | − | 2 | × | 1 | − | 6 | ( | x | − | 2 | ) |
| = | 2 | x | − | 2 | − | 6 | ( | x | − | 2 | ) |
| = | 2 | x | − | 2 | − | 6 | x | + | 6 | × | 2 |
| = | 2 | x | − | 2 | − | 6 | x | + | 12 |
| = | - | 4 | x | + | 10 |
| - | 4 | x | + | 10 | = | 3 | ( | 1 | − | x | ) |
| 方程右边 = | 3 | × | 1 | − | 3 | x |
| = | 3 | − | 3 | x |
| - | 4 | x | + | 10 | = | 3 | − | 3 | x |
| - | 4 | x | + | 3 | x | = | 3 | − | 10 |
| - | x | = | 3 | − | 10 |
| - | x | = | 3 | − | 10 |
| - | x | = | - | 7 |
| 7 | = | x |
| x | = | 7 |