| 6 | x | − | 8 | = | 8 | x | − | 4 |
| 6 | x | − | 8 | x | = | - | 4 | + | 8 |
| - | 2 | x | = | - | 4 | + | 8 |
| - | 2 | x | = | 4 |
| - | 4 | = | 2 | x |
| 2 | x | = | - | 4 |
| x | = | - | 4 | ÷ | 2 |
| = | - | 4 | × | 1 2 |
| = | - | 2 | × | 1 |
| x | = | - | 2 |
| 6 | x | − | 8 | x | = | - | 8 | − | 4 |
| 方程左边 = | - | 2 | x |
| - | 2 | x | = | - | 8 | − | 4 |
| 方程右边 = | - | 12 |
| - | 2 | x | = | - | 12 |
| 12 | = | 2 | x |
| 2 | x | = | 12 |
| x | = | 12 | ÷ | 2 |
| = | 12 | × | 1 2 |
| = | 6 | × | 1 |
| x | = | 6 |