| 3500 | Q | − | ( | 120 | + | 2000 | Q | + | 927 4 | ) | − | ( | 3500 | Q | × | 13 100 | − | ( | 5 | + | 150 | Q | ) | − | 140 | ) | × | 3 25 | = | 0 |
| 方程左边 = | 3500 | Q | − | 120 | − | 2000 | Q | − | 927 4 | − | ( | 3500 | Q | × | 13 100 | − | ( | 5 | + | 150 | Q | ) | − | 140 | ) | × | 3 25 |
| = | 1500 | Q | − | 1407 4 | − | ( | 3500 | Q | × | 13 100 | − | ( | 5 | + | 150 | Q | ) | − | 140 | ) | × | 3 25 |
| = | 1500 | Q | − | 1407 4 | − | 3500 | Q | × | 13 100 | × | 3 25 | + | ( | 5 | + | 150 | Q | ) | × | 3 25 | + | 140 | × | 3 25 |
| = | 1500 | Q | − | 1407 4 | − | 273 5 | Q | + | ( | 5 | + | 150 | Q | ) | × | 3 25 | + | 84 5 |
| = | 7227 5 | Q | − | 6699 20 | + | ( | 5 | + | 150 | Q | ) | × | 3 25 |
| = | 7227 5 | Q | − | 6699 20 | + | 5 | × | 3 25 | + | 150 | Q | × | 3 25 |
| = | 7227 5 | Q | − | 6699 20 | + | 3 5 | + | 18 | Q |
| = | 7317 5 | Q | − | 6687 20 |
7317 5 | Q | − | 6687 20 | = | 0 |
7317 5 | Q | = | 0 | + | 6687 20 |
7317 5 | Q | = | 6687 20 |
| Q | = | 6687 20 | ÷ | 7317 5 |
| = | 6687 20 | × | 5 7317 |
| = | 743 4 | × | 1 813 |
| Q | = | 743 3252 |
| Q | = | 0.228475 |