| p | ( | 20 100 | ) | + | ( | 1 | − | p | ) | ( | 167 1000 | ) | = | 1 100 |
| 方程左边 = | p | × | 20 100 | + | ( | 1 | − | p | ) | ( | 167 1000 | ) |
| = | 20 100 | p | + | 1 | ( | 167 1000 | ) | − | p | ( | 167 1000 | ) |
| = | 20 100 | p | + | 1 | × | 167 1000 | − | p | ( | 167 1000 | ) |
| = | 20 100 | p | + | 167 1000 | − | p | ( | 167 1000 | ) |
| = | 20 100 | p | + | 167 1000 | − | p | × | 167 1000 |
| = | 33 1000 | p | + | 167 1000 |
33 1000 | p | + | 167 1000 | = | 1 100 |
33 1000 | p | = | 1 100 | − | 167 1000 |
33 1000 | p | = | - | 157 1000 |
| p | = | - | 157 1000 | ÷ | 33 1000 |
| = | - | 157 1000 | × | 1000 33 |
| = | - | 157 | × | 1 33 |
| p | = | - | 157 33 |
| p | = | - 4.757576 |