| 6 | x | × | 1 | − | 9 | x | × | 2 | = | 29 |
| 方程左边 = | 6 | x | − | 18 | x |
| = | - | 12 | x |
| - | 12 | x | = | 29 |
| - | 29 | = | 12 | x |
| 12 | x | = | - | 29 |
| x | = | - | 29 | ÷ | 12 |
| = | - | 29 | × | 1 12 |
| x | = | - | 29 12 |
| x | = | - 2.416667 |
| - | 9 | x | × | 1 | + | 14 | x | × | 2 | = | - | 39 |
| 方程左边 = | - | 9 | x | + | 28 | x |
| = | 19 | x |
| 19 | x | = | - | 39 |
| x | = | - | 39 | ÷ | 19 |
| = | - | 39 | × | 1 19 |
| x | = | - | 39 19 |
| x | = | - 2.052632 |