| x | ÷ | ( | 15 2 | − | x | ) | = | 139 250 | ÷ | 156 |
| 方程两边同时乘以: | ( | 15 2 | − | x | ) |
| x | = | 139 250 | ÷ | 156 | × | ( | 15 2 | − | x | ) |
| x | = | 139 250 | ÷ | 156 | × | 15 2 | − | 139 250 | ÷ | 156 | × | x |
| x | = | 139 5200 | − | 139 39000 | x |
| x | + | 139 39000 | x | = | 139 5200 |
39139 39000 | x | = | 139 5200 |
| x | = | 139 5200 | ÷ | 39139 39000 |
| = | 139 5200 | × | 39000 39139 |
| = | 139 2 | × | 15 39139 |
| x | = | 2085 78278 |
| x | = | 0.026636 |