| 1 | − | ( | 3 | x | − | 1 | ) | ÷ | 4 | = | ( | 3 | + | x | ) | ÷ | 2 |
| 方程左边 = | 1 | − | 3 | x | × | 1 4 | + | 1 | × | 1 4 |
| = | 1 | − | 3 4 | x | + | 1 4 |
| = | 5 4 | − | 3 4 | x |
5 4 | − | 3 4 | x | = | ( | 3 | + | x | ) | ÷ | 2 |
| 方程右边 = | 3 | × | 1 2 | + | x | × | 1 2 |
| = | 3 2 | + | x | × | 1 2 |
5 4 | − | 3 4 | x | = | 3 2 | + | 1 2 | x |
| - | 3 4 | x | − | 1 2 | x | = | 3 2 | − | 5 4 |
| - | 5 4 | x | = | 3 2 | − | 5 4 |
| - | 5 4 | x | = | 1 4 |
| - | 1 4 | = | 5 4 | x |
5 4 | x | = | - | 1 4 |
| x | = | - | 1 4 | ÷ | 5 4 |
| = | - | 1 4 | × | 4 5 |
| = | - | 1 | × | 1 5 |
| x | = | - | 1 5 |
| x | = | - 0.2 |