| ( | 1 | − | 2 | x | ) | ÷ | 3 | = | ( | x | + | 3 | ) | ÷ | 4 |
| 方程左边 = | 1 | × | 1 3 | − | 2 | x | × | 1 3 |
| = | 1 3 | − | 2 3 | x |
1 3 | − | 2 3 | x | = | ( | x | + | 3 | ) | ÷ | 4 |
| 方程右边 = | x | × | 1 4 | + | 3 | × | 1 4 |
| = | x | × | 1 4 | + | 3 4 |
1 3 | − | 2 3 | x | = | 1 4 | x | + | 3 4 |
| - | 2 3 | x | − | 1 4 | x | = | 3 4 | − | 1 3 |
| - | 11 12 | x | = | 3 4 | − | 1 3 |
| - | 11 12 | x | = | 5 12 |
| - | 5 12 | = | 11 12 | x |
11 12 | x | = | - | 5 12 |
| x | = | - | 5 12 | ÷ | 11 12 |
| = | - | 5 12 | × | 12 11 |
| = | - | 5 | × | 1 11 |
| x | = | - | 5 11 |
| x | = | - 0.454545 |