| 3 | ( | 2 | + | x | ) | − | 5 | ( | 2 | x | − | 1 | ) | = | - | 2 | ( | 3 | x | − | 2 | ) |
| 方程左边 = | 3 | × | 2 | + | 3 | x | − | 5 | ( | 2 | x | − | 1 | ) |
| = | 6 | + | 3 | x | − | 5 | ( | 2 | x | − | 1 | ) |
| = | 6 | + | 3 | x | − | 5 | × | 2 | x | + | 5 | × | 1 |
| = | 6 | + | 3 | x | − | 10 | x | + | 5 |
| = | 11 | − | 7 | x |
| 11 | − | 7 | x | = | - | 2 | ( | 3 | x | − | 2 | ) |
| 方程右边 = | - | 2 | × | 3 | x | + | 2 | × | 2 |
| = | - | 6 | x | + | 4 |
| 11 | − | 7 | x | = | - | 6 | x | + | 4 |
| - | 7 | x | + | 6 | x | = | 4 | − | 11 |
| - | x | = | 4 | − | 11 |
| - | x | = | 4 | − | 11 |
| - | x | = | - | 7 |
| 7 | = | x |
| x | = | 7 |