| ( | 10 | − | X | ) | ÷ | X | = | 2143 5000 |
| Multiply both sides of the equation by: | X |
| ( | 10 | − | X | ) | = | 2143 5000 | X |
| 10 | − | X | = | 2143 5000 | X |
| - | X | − | 2143 5000 | X | = | - | 10 |
| - | 7143 5000 | X | = | - | 10 |
| 10 | = | 7143 5000 | X |
7143 5000 | X | = | 10 |
| X | = | 10 | ÷ | 7143 5000 |
| = | 10 | × | 5000 7143 |
| X | = | 50000 7143 |
| X | = | 6.99986 |