| 240 | ÷ | ( | x | − | 139 100 | ) | = | 250 | ÷ | ( | 161 100 | − | 139 100 | ) |
| 方程两边同时乘以: | ( | x | − | 139 100 | ) | , | ( | 161 100 | − | 139 100 | ) |
| 240 | ( | 161 100 | − | 139 100 | ) | = | 250 | ( | x | − | 139 100 | ) |
| 240 | × | 161 100 | − | 240 | × | 139 100 | = | 250 | ( | x | − | 139 100 | ) |
| 240 | × | 161 100 | − | 240 | × | 139 100 | = | 250 | x | − | 250 | × | 139 100 |
1932 5 | − | 1668 5 | = | 250 | x | − | 695 2 |
264 5 | = | 250 | x | − | 695 2 |
| - | 250 | x | = | - | 695 2 | − | 264 5 |
| - | 250 | x | = | - | 4003 10 |
4003 10 | = | 250 | x |
| 250 | x | = | 4003 10 |
| x | = | 4003 10 | ÷ | 250 |
| = | 4003 10 | × | 1 250 |
| x | = | 4003 2500 |
| x | = | 1.6012 |