| ( | 44240 | + | 553 100 | x | ) | ÷ | ( | 8000 | + | x | ) | = | 57 10 |
| 方程两边同时乘以: | ( | 8000 | + | x | ) |
| ( | 44240 | + | 553 100 | x | ) | = | 57 10 | ( | 8000 | + | x | ) |
| 44240 | + | 553 100 | x | = | 57 10 | ( | 8000 | + | x | ) |
| 44240 | + | 553 100 | x | = | 57 10 | × | 8000 | + | 57 10 | x |
| 44240 | + | 553 100 | x | = | 45600 | + | 57 10 | x |
553 100 | x | − | 57 10 | x | = | 45600 | − | 44240 |
| - | 17 100 | x | = | 45600 | − | 44240 |
| - | 17 100 | x | = | 1360 |
| - | 1360 | = | 17 100 | x |
17 100 | x | = | - | 1360 |
| x | = | - | 1360 | ÷ | 17 100 |
| = | - | 1360 | × | 100 17 |
| = | - | 80 | × | 100 |
| x | = | - | 8000 |