| ( | 7837 100 | − | x | ) | ÷ | 7837 100 | = | 13 250 |
| 方程左边 = | 7837 100 | × | 100 7837 | − | x | × | 100 7837 |
| = | 1 | − | x | × | 100 7837 |
| 1 | − | 100 7837 | x | = | 13 250 |
| - | 100 7837 | x | = | 13 250 | − | 1 |
| - | 100 7837 | x | = | - | 237 250 |
237 250 | = | 100 7837 | x |
100 7837 | x | = | 237 250 |
| x | = | 237 250 | ÷ | 100 7837 |
| = | 237 250 | × | 7837 100 |
| x | = | 1857369 25000 |
| x | = | 74.29476 |