| ( | p | − | 419 | ) | ÷ | p | = | 2913 500 | ÷ | 5617 10000 |
| 方程两边同时乘以: | p |
| ( | p | − | 419 | ) | = | 2913 500 | ÷ | 5617 10000 | × | p |
| p | − | 419 | = | 2913 500 | ÷ | 5617 10000 | × | p |
| p | − | 419 | = | 58260 5617 | p |
| p | − | 58260 5617 | p | = | 419 |
| - | 52643 5617 | p | = | 419 |
| - | 419 | = | 52643 5617 | p |
52643 5617 | p | = | - | 419 |
| p | = | - | 419 | ÷ | 52643 5617 |
| = | - | 419 | × | 5617 52643 |
| p | = | - | 2353523 52643 |
| p | = | - 44.707236 |