| 480000 | = | 10000 | p | ( | 1 | − | 5 100 | ) | − | 1040000 |
| 方程右边 = | 10000 | p | × | 1 | − | 10000 | p | × | 5 100 | − | 1040000 |
| = | 10000 | p | − | 500 | p | − | 1040000 |
| = | 9500 | p | − | 1040000 |
| 480000 | = | 9500 | p | − | 1040000 |
| - | 9500 | p | = | - | 1040000 | − | 480000 |
| - | 9500 | p | = | - | 1520000 |
| 1520000 | = | 9500 | p |
| 9500 | p | = | 1520000 |
| p | = | 1520000 | ÷ | 9500 |
| = | 1520000 | × | 1 9500 |
| = | 160 | × | 1 |
| p | = | 160 |