| - | 5 | ( | 8 | p | − | 8 | ) | = | - | 10 | − | ( | 5 | p | + | 4 | ) |
| 方程左边 = | - | 5 | × | 8 | p | + | 5 | × | 8 |
| = | - | 40 | p | + | 40 |
| - | 40 | p | + | 40 | = | - | 10 | − | ( | 5 | p | + | 4 | ) |
| 方程右边 = | - | 10 | − | 5 | p | − | 4 |
| = | - | 14 | − | 5 | p |
| - | 40 | p | + | 40 | = | - | 14 | − | 5 | p |
| - | 40 | p | + | 5 | p | = | - | 14 | − | 40 |
| - | 35 | p | = | - | 14 | − | 40 |
| - | 35 | p | = | - | 54 |
| 54 | = | 35 | p |
| 35 | p | = | 54 |
| p | = | 54 | ÷ | 35 |
| = | 54 | × | 1 35 |
| p | = | 54 35 |
| p | = | 1.542857 |