| X | × | 600 | ÷ | ( | ( | 1 | − | X | ) | × | 1800 | ) | = | 83 1000 |
| Multiply both sides of the equation by: | ( | ( | 1 | − | X | ) | × | 1800 | ) |
| X | × | 600 | = | 83 1000 | ( | ( | 1 | − | X | ) | × | 1800 | ) |
| X | × | 600 | = | 83 1000 | ( | 1 | − | X | ) | × | 1800 |
| X | × | 600 | = | 747 5 | ( | 1 | − | X | ) |
| 600 | X | = | 747 5 | × | 1 | − | 747 5 | X |
| 600 | X | = | 747 5 | − | 747 5 | X |
| 600 | X | + | 747 5 | X | = | 747 5 |
3747 5 | X | = | 747 5 |
| X | = | 747 5 | ÷ | 3747 5 |
| = | 747 5 | × | 5 3747 |
| = | 249 | × | 1 1249 |
| X | = | 249 1249 |
| X | = | 0.199359 |