| 1200 | = | 157 50 | × | 1 2 | ( | 40 | × | 3 | + | 30 | + | 4 | + | 50 | + | 2 | + | 80 | x | ) | + | 2200 | × | 157 50 | × | 1 4 | × | 1 4 |
| 方程右边 = | 157 100 | ( | 40 | × | 3 | + | 30 | + | 4 | + | 50 | + | 2 | + | 80 | x | ) | + | 1727 4 |
| 1200 | = | 157 100 | ( | 40 | × | 3 | + | 30 | + | 4 | + | 50 | + | 2 | + | 80 | x | ) | + | 1727 4 |
| 方程右边 = | 157 100 | × | 40 | × | 3 | + | 157 100 | × | 30 | + | 157 100 | × | 4 | + | 157 100 | × | 50 | + | 157 100 | × | 2 | + | 157 100 |
| = | 942 5 | + | 471 10 | + | 157 25 | + | 157 2 | + | 157 50 | + | 628 5 | x | + | 1727 4 |
| = | 75517 100 | + | 628 5 | x |
| 1200 | = | 75517 100 | + | 628 5 | x |
| - | 628 5 | x | = | 75517 100 | − | 1200 |
| - | 628 5 | x | = | - | 44483 100 |
44483 100 | = | 628 5 | x |
628 5 | x | = | 44483 100 |
| x | = | 44483 100 | ÷ | 628 5 |
| = | 44483 100 | × | 5 628 |
| = | 44483 20 | × | 1 628 |
| x | = | 44483 12560 |
| x | = | 3.54164 |