| 250 | = | 157 50 | ÷ | 4 | × | ( | x | x | ) | × | 9 5 | x | + | 13 50 | ( | x | x | x | ) |
| 方程右边 = | 1413 1000 | ( | x | x | ) | x | + | 13 50 | ( | x | x | x | ) |
| 250 | = | 1413 1000 | ( | x | x | ) | x | + | 13 50 | ( | x | x | x | ) |
| 方程右边 = | 1413 1000 | x | x | x | + | 13 50 | ( | x | x | x | ) |
| = | 1413 1000 | x | x | x | + | 13 50 | x | x | x |
| 250 | = | 1413 1000 | x | x | x | + | 13 50 | x | x | x |