| ( | ( | 127 | x | ) | + | 457 | ) | ÷ | 8 | = | 50 |
| 方程左边 = | ( | 127 | x | ) | × | 1 8 | + | 457 | × | 1 8 |
| = | ( | 127 | x | ) | × | 1 8 | + | 457 8 |
| = | 127 | x | × | 1 8 | + | 457 8 |
| = | 127 8 | x | + | 457 8 |
127 8 | x | + | 457 8 | = | 50 |
127 8 | x | = | 50 | − | 457 8 |
127 8 | x | = | - | 57 8 |
| x | = | - | 57 8 | ÷ | 127 8 |
| = | - | 57 8 | × | 8 127 |
| = | - | 57 | × | 1 127 |
| x | = | - | 57 127 |
| x | = | - 0.448819 |