| ( | 180 | − | X | ) | ÷ | X | = | 3838 2500 |
| Multiply both sides of the equation by: | X |
| ( | 180 | − | X | ) | = | 3838 2500 | X |
| 180 | − | X | = | 3838 2500 | X |
| - | X | − | 3838 2500 | X | = | - | 180 |
| - | 3169 1250 | X | = | - | 180 |
| 180 | = | 3169 1250 | X |
3169 1250 | X | = | 180 |
| X | = | 180 | ÷ | 3169 1250 |
| = | 180 | × | 1250 3169 |
| X | = | 225000 3169 |
| X | = | 71.000316 |