| - | 8 | x | ÷ | 1 200 | ÷ | 1 200 | × | 1 20 | × | 1 20 | × | 1 20 | × | 1 20 | = | 8 | × | 64 | ÷ | 3 | × | x | − | 20000 | × | 64 | ÷ | 3 |
| 方程左边 = | - | 2 | x |
| - | 2 | x | = | 8 | × | 64 | ÷ | 3 | × | x | − | 20000 | × | 64 | ÷ | 3 |
| 方程右边 = | 512 3 | x | − | 1280000 3 |
| - | 2 | x | = | 512 3 | x | − | 1280000 3 |
| - | 2 | x | − | 512 3 | x | = | - | 1280000 3 |
| - | 518 3 | x | = | - | 1280000 3 |
1280000 3 | = | 518 3 | x |
518 3 | x | = | 1280000 3 |
| x | = | 1280000 3 | ÷ | 518 3 |
| = | 1280000 3 | × | 3 518 |
| = | 640000 | × | 1 259 |
| x | = | 640000 259 |
| x | = | 2471.042471 |