| X | × | 600 | ÷ | ( | ( | 1 | − | X | ) | × | 1800 | ) | = | 9 100 |
| Multiply both sides of the equation by: | ( | ( | 1 | − | X | ) | × | 1800 | ) |
| X | × | 600 | = | 9 100 | ( | ( | 1 | − | X | ) | × | 1800 | ) |
| X | × | 600 | = | 9 100 | ( | 1 | − | X | ) | × | 1800 |
| X | × | 600 | = | 162 | ( | 1 | − | X | ) |
| 600 | X | = | 162 | × | 1 | − | 162 | X |
| 600 | X | = | 162 | − | 162 | X |
| 600 | X | + | 162 | X | = | 162 |
| 762 | X | = | 162 |
| X | = | 162 | ÷ | 762 |
| = | 162 | × | 1 762 |
| = | 27 | × | 1 127 |
| X | = | 27 127 |
| X | = | 0.212598 |