| 8000 | + | x | × | 1 20 | + | 2590 | + | x | × | 3 10 | + | x | ÷ | 40 | ÷ | 1 5 | ÷ | 4 5 | × | 3 100 | = | x |
| 方程左边 = | 8000 | + | x | × | 1 20 | + | 2590 | + | x | × | 3 10 | + | x | × | 3 640 |
| = | 10590 | + | 227 640 | x |
| 10590 | + | 227 640 | x | = | x |
227 640 | x | − | x | = | - | 10590 |
| - | 413 640 | x | = | - | 10590 |
| 10590 | = | 413 640 | x |
413 640 | x | = | 10590 |
| x | = | 10590 | ÷ | 413 640 |
| = | 10590 | × | 640 413 |
| x | = | 6777600 413 |
| x | = | 16410.653753 |