3 10 | ÷ | 2000 | − | p | ÷ | 2000 | = | - | 2 |
| 方程左边 = | 3 20000 | − | p | × | 1 2000 |
3 20000 | − | 1 2000 | p | = | - | 2 |
| - | 1 2000 | p | = | - | 2 | − | 3 20000 |
| - | 1 2000 | p | = | - | 40003 20000 |
40003 20000 | = | 1 2000 | p |
1 2000 | p | = | 40003 20000 |
| p | = | 40003 20000 | ÷ | 1 2000 |
| = | 40003 20000 | × | 2000 |
| = | 40003 10 | × | 1 |
| p | = | 40003 10 |
| p | = | 4000.3 |