| ( | 5 | ( | 145 | x | ) | × | 4 | × | 142 | ) | ÷ | ( | 160 | x | ) | = | 124 25 |
| 方程两边同时乘以: | ( | 160 | x | ) |
| ( | 5 | ( | 145 | x | ) | × | 4 | × | 142 | ) | = | 124 25 | ( | 160 | x | ) |
| 5 | ( | 145 | x | ) | × | 4 | × | 142 | = | 124 25 | ( | 160 | x | ) |
| 5 | ( | 145 | x | ) | × | 4 | × | 142 | = | 124 25 | × | 160 | x |
| 2840 | ( | 145 | x | ) | = | 3968 5 | x |
| 2840 | × | 145 | x | = | 3968 5 | x |
| 411800 | x | = | 3968 5 | x |
| 411800 | x | − | 3968 5 | x | = | 0 |
2055032 5 | x | = | 0 |
| x | = | 0 | ÷ | 2055032 5 |
| = | 0 | × | 5 2055032 |
| x | = | 0 |
| x | = | 0 |