| 307700 | = | 1060 | x | ( | 1 | − | 1 20 | ) | − | 800000 |
| 方程右边 = | 1060 | x | × | 1 | − | 1060 | x | × | 1 20 | − | 800000 |
| = | 1060 | x | − | 53 | x | − | 800000 |
| = | 1007 | x | − | 800000 |
| 307700 | = | 1007 | x | − | 800000 |
| - | 1007 | x | = | - | 800000 | − | 307700 |
| - | 1007 | x | = | - | 1107700 |
| 1107700 | = | 1007 | x |
| 1007 | x | = | 1107700 |
| x | = | 1107700 | ÷ | 1007 |
| = | 1107700 | × | 1 1007 |
| = | 1100 | × | 1 |
| x | = | 1100 |