| 1400 | Q | − | ( | ( | 400 | + | 550 | Q | ) | + | 33157 100 | ) | − | 1400 | Q | × | 3 50 | = | 0 |
| 方程左边 = | 1400 | Q | − | ( | ( | 400 | + | 550 | Q | ) | + | 33157 100 | ) | − | 84 | Q |
| = | 1316 | Q | − | ( | ( | 400 | + | 550 | Q | ) | + | 33157 100 | ) |
| 1316 | Q | − | ( | ( | 400 | + | 550 | Q | ) | + | 33157 100 | ) | = | 0 |
| 方程左边 = | 1316 | Q | − | ( | 400 | + | 550 | Q | ) | − | 33157 100 |
| = | 1316 | Q | − | 400 | − | 550 | Q | − | 33157 100 |
| = | 766 | Q | − | 73157 100 |
| 766 | Q | − | 73157 100 | = | 0 |
| 766 | Q | = | 0 | + | 73157 100 |
| 766 | Q | = | 73157 100 |
| Q | = | 73157 100 | ÷ | 766 |
| = | 73157 100 | × | 1 766 |
| Q | = | 73157 76600 |
| Q | = | 0.955052 |