| ( | 10689 | − | x | ) | ÷ | x | = | 69 500 |
| Multiply both sides of the equation by: | x |
| ( | 10689 | − | x | ) | = | 69 500 | x |
| 10689 | − | x | = | 69 500 | x |
| - | x | − | 69 500 | x | = | - | 10689 |
| - | 569 500 | x | = | - | 10689 |
| 10689 | = | 569 500 | x |
569 500 | x | = | 10689 |
| x | = | 10689 | ÷ | 569 500 |
| = | 10689 | × | 500 569 |
| x | = | 5344500 569 |
| x | = | 9392.794376 |