| - | 4 | − | 2 | x | + | 3 | x | × | 2 | = | - | 3 | + | 2 | x | + | 3 | x | × | 2 |
| 方程左边 = | - | 4 | − | 2 | x | + | 6 | x |
| = | - | 4 | + | 4 | x |
| - | 4 | + | 4 | x | = | - | 3 | + | 2 | x | + | 3 | x | × | 2 |
| 方程右边 = | - | 3 | + | 2 | x | + | 6 | x |
| = | - | 3 | + | 8 | x |
| - | 4 | + | 4 | x | = | - | 3 | + | 8 | x |
| 4 | x | − | 8 | x | = | - | 3 | + | 4 |
| - | 4 | x | = | - | 3 | + | 4 |
| - | 4 | x | = | 1 |
| - | 1 | = | 4 | x |
| 4 | x | = | - | 1 |
| x | = | - | 1 | ÷ | 4 |
| = | - | 1 | × | 1 4 |
| x | = | - | 1 4 |
| x | = | - 0.25 |