| ( | 450 | Q | × | 13 100 | − | 15 | Q | − | 152 5 | ) | × | 3 25 | = | 0 |
| 方程左边 = | 450 | Q | × | 13 100 | × | 3 25 | − | 15 | Q | × | 3 25 | − | 152 5 | × | 3 25 |
| = | 351 50 | Q | − | 9 5 | Q | − | 456 125 |
| = | 261 50 | Q | − | 456 125 |
261 50 | Q | − | 456 125 | = | 0 |
261 50 | Q | = | 0 | + | 456 125 |
261 50 | Q | = | 456 125 |
| Q | = | 456 125 | ÷ | 261 50 |
| = | 456 125 | × | 50 261 |
| = | 152 5 | × | 2 87 |
| Q | = | 304 435 |
| Q | = | 0.698851 |