| ( | 517 | − | X | ) | ÷ | X | = | 1561 5000 |
| Multiply both sides of the equation by: | X |
| ( | 517 | − | X | ) | = | 1561 5000 | X |
| 517 | − | X | = | 1561 5000 | X |
| - | X | − | 1561 5000 | X | = | - | 517 |
| - | 6561 5000 | X | = | - | 517 |
| 517 | = | 6561 5000 | X |
6561 5000 | X | = | 517 |
| X | = | 517 | ÷ | 6561 5000 |
| = | 517 | × | 5000 6561 |
| X | = | 2585000 6561 |
| X | = | 393.994818 |