| ( | 6000 | − | ( | 5000 | × | 300 | ÷ | 330 | ) | ) | × | 330 | ÷ | 360 | = | x |
| 方程左边 = | ( | 6000 | − | ( | 5000 | × | 300 | ÷ | 330 | ) | ) | × | 11 12 |
| ( | 6000 | − | ( | 5000 | × | 300 | ÷ | 330 | ) | ) | × | 11 12 | = | x |
| 方程左边 = | 6000 | × | 11 12 | − | ( | 5000 | × | 300 | ÷ | 330 | ) | × | 11 12 |
| = | 5500 | − | ( | 5000 | × | 300 | ÷ | 330 | ) | × | 11 12 |
| = | 5500 | − | 5000 | × | 300 | ÷ | 330 | × | 11 12 |
| = | 5500 | − | 12500 3 |
| = | 4000 3 |
4000 3 | = | x |
| - | x | = | - | 4000 3 |
4000 3 | = | x |
| x | = | 4000 3 |