| x | × | 1 | − | x | × | 2 | + | 2 | x | × | 3 | = | 2 |
| 方程左边 = | x | × | 1 | − | x | × | 2 | + | 6 | x |
| = | 5 | x |
| 5 | x | = | 2 |
| x | = | 2 | ÷ | 5 |
| = | 2 | × | 1 5 |
| x | = | 2 5 |
| x | = | 0.4 |
| - | x | × | 1 | + | 2 | x | × | 2 | − | 3 | x | × | 3 | = | 3 |
| 方程左边 = | - | x | × | 1 | + | 4 | x | − | 9 | x |
| = | - | 6 | x |
| - | 6 | x | = | 3 |
| - | 3 | = | 6 | x |
| 6 | x | = | - | 3 |
| x | = | - | 3 | ÷ | 6 |
| = | - | 3 | × | 1 6 |
| = | - | 1 | × | 1 2 |
| x | = | - | 1 2 |
| x | = | - 0.5 |
| 2 | x | × | 1 | − | 3 | x | × | 2 | + | 5 | x | × | 3 | = | - | 1 |
| 方程左边 = | 2 | x | − | 6 | x | + | 15 | x |
| = | 11 | x |
| 11 | x | = | - | 1 |
| x | = | - | 1 | ÷ | 11 |
| = | - | 1 | × | 1 11 |
| x | = | - | 1 11 |
| x | = | - 0.090909 |