| 2 | ( | x | + | 3 | ) | − | 7 | = | x | − | 5 | ( | 2 | x | − | 1 | ) |
| 方程左边 = | 2 | x | + | 2 | × | 3 | − | 7 |
| = | 2 | x | + | 6 | − | 7 |
| = | 2 | x | − | 1 |
| 2 | x | − | 1 | = | x | − | 5 | ( | 2 | x | − | 1 | ) |
| 方程右边 = | x | − | 5 | × | 2 | x | + | 5 | × | 1 |
| = | x | − | 10 | x | + | 5 |
| = | - | 9 | x | + | 5 |
| 2 | x | − | 1 | = | - | 9 | x | + | 5 |
| 2 | x | + | 9 | x | = | 5 | + | 1 |
| 11 | x | = | 5 | + | 1 |
| 11 | x | = | 6 |
| x | = | 6 | ÷ | 11 |
| = | 6 | × | 1 11 |
| x | = | 6 11 |
| x | = | 0.545455 |