| ( | 0 | + | x | ) | − | ( | - | 10 | + | 2 | x | ) | = | ( | 8 | + | 4 | x | ) | − | ( | 0 | + | x | ) |
| 方程左边 = | 0 | + | x | − | ( | - | 10 | + | 2 | x | ) |
| = | 0 | + | x | + | 10 | − | 2 | x |
| = | 10 | − | 1 | x |
| 10 | − | 1 | x | = | ( | 8 | + | 4 | x | ) | − | ( | 0 | + | x | ) |
| 方程右边 = | 8 | + | 4 | x | − | ( | 0 | + | x | ) |
| = | 8 | + | 4 | x | − | 0 | − | x |
| = | 8 | + | 3 | x |
| 10 | − | 1 | x | = | 8 | + | 3 | x |
| - | 1 | x | − | 3 | x | = | 8 | − | 10 |
| - | 4 | x | = | 8 | − | 10 |
| - | 4 | x | = | - | 2 |
| 2 | = | 4 | x |
| 4 | x | = | 2 |
| x | = | 2 | ÷ | 4 |
| = | 2 | × | 1 4 |
| = | 1 | × | 1 2 |
| x | = | 1 2 |
| x | = | 0.5 |