| ( | x | − | 2 | ) | ÷ | 5 | − | ( | x | − | 4 | ) | ÷ | 3 | = | 1 |
| 方程左边 = | x | × | 1 5 | − | 2 | × | 1 5 | − | ( | x | − | 4 | ) | × | 1 3 |
| = | x | × | 1 5 | − | 2 5 | − | ( | x | − | 4 | ) | × | 1 3 |
| = | 1 5 | x | − | 2 5 | − | x | × | 1 3 | + | 4 | × | 1 3 |
| = | 1 5 | x | − | 2 5 | − | x | × | 1 3 | + | 4 3 |
| = | - | 2 15 | x | + | 14 15 |
| - | 2 15 | x | + | 14 15 | = | 1 |
| - | 2 15 | x | = | 1 | − | 14 15 |
| - | 2 15 | x | = | 1 15 |
| - | 1 15 | = | 2 15 | x |
2 15 | x | = | - | 1 15 |
| x | = | - | 1 15 | ÷ | 2 15 |
| = | - | 1 15 | × | 15 2 |
| = | - | 1 | × | 1 2 |
| x | = | - | 1 2 |
| x | = | - 0.5 |