| ( | 1 | − | x | ) | ÷ | 2 | − | ( | 2 | x | − | 1 | ) | ÷ | 6 | = | 1 |
| 方程左边 = | 1 | × | 1 2 | − | x | × | 1 2 | − | ( | 2 | x | − | 1 | ) | × | 1 6 |
| = | 1 2 | − | x | × | 1 2 | − | ( | 2 | x | − | 1 | ) | × | 1 6 |
| = | 1 2 | − | 1 2 | x | − | 2 | x | × | 1 6 | + | 1 | × | 1 6 |
| = | 1 2 | − | 1 2 | x | − | 1 3 | x | + | 1 6 |
| = | 2 3 | − | 5 6 | x |
2 3 | − | 5 6 | x | = | 1 |
| - | 5 6 | x | = | 1 | − | 2 3 |
| - | 5 6 | x | = | 1 3 |
| - | 1 3 | = | 5 6 | x |
5 6 | x | = | - | 1 3 |
| x | = | - | 1 3 | ÷ | 5 6 |
| = | - | 1 3 | × | 6 5 |
| = | - | 1 | × | 2 5 |
| x | = | - | 2 5 |
| x | = | - 0.4 |