| 6 | x | − | 2 | x | + | 4 | = | x | − | 1 2 | ( | 3 | x | + | 1 | ) |
| 方程左边 = | 4 | x | + | 4 |
| 4 | x | + | 4 | = | x | − | 1 2 | ( | 3 | x | + | 1 | ) |
| 方程右边 = | x | − | 1 2 | × | 3 | x | − | 1 2 | × | 1 |
| = | x | − | 3 2 | x | − | 1 2 |
| = | - | 1 2 | x | − | 1 2 |
| 4 | x | + | 4 | = | - | 1 2 | x | − | 1 2 |
| 4 | x | + | 1 2 | x | = | - | 1 2 | − | 4 |
9 2 | x | = | - | 1 2 | − | 4 |
9 2 | x | = | - | 9 2 |
| x | = | - | 9 2 | ÷ | 9 2 |
| = | - | 9 2 | × | 2 9 |
| = | - | 1 | × | 1 |
| x | = | - | 1 |