| x | ( | - | 1 | ) | + | 28 5 | x | ( | - | 163 50 | ) | = | 8 |
| 方程左边 = | - | x | × | 1 | + | 28 5 | x | ( | - | 163 50 | ) |
| = | - | 1 | x | − | 28 5 | x | × | 163 50 |
| = | - | 1 | x | − | 2282 125 | x |
| = | - | 2407 125 | x |
| - | 2407 125 | x | = | 8 |
| - | 8 | = | 2407 125 | x |
2407 125 | x | = | - | 8 |
| x | = | - | 8 | ÷ | 2407 125 |
| = | - | 8 | × | 125 2407 |
| x | = | - | 1000 2407 |
| x | = | - 0.415455 |