| 4 | x | − | 8 | = | 15 |
| 4 | x | = | 15 | + | 8 |
| 4 | x | = | 23 |
| x | = | 23 | ÷ | 4 |
| = | 23 | × | 1 4 |
| x | = | 23 4 |
| x | = | 5.75 |
| 4 | x | + | 18 5 | x | = | 76 5 |
| 方程左边 = | 38 5 | x |
38 5 | x | = | 76 5 |
| x | = | 76 5 | ÷ | 38 5 |
| = | 76 5 | × | 5 38 |
| = | 2 | × | 1 |
| x | = | 2 |
| 56 | − | x | = | 7 |
| - | x | = | 7 | − | 56 |
| - | x | = | - | 49 |
| 49 | = | x |
| x | = | 49 |
| 14 | + | 10 | x | = | 65 |
| 10 | x | = | 65 | − | 14 |
| 10 | x | = | 51 |
| x | = | 51 | ÷ | 10 |
| = | 51 | × | 1 10 |
| x | = | 51 10 |
| x | = | 5.1 |
| 45 | − | 2 | x | = | 45 |
| - | 2 | x | = | 45 | − | 45 |
| - | 2 | x | = | 0 |
| - | 0 | = | 2 | x |
| 2 | x | = | - | 0 |
| x | = | - | 0 | ÷ | 2 |
| = | - | 0 | × | 1 2 |
| x | = | 0 |
| 6 | x | − | 2 | x | = | 56 |
| 方程左边 = | 4 | x |
| 4 | x | = | 56 |
| x | = | 56 | ÷ | 4 |
| = | 56 | × | 1 4 |
| = | 14 | × | 1 |
| x | = | 14 |