| ( | X | − | 16 100 | ) | ÷ | ( | 18 100 | − | X | ) | = | 160 | ÷ | 50 |
| Multiply both sides of the equation by: | ( | 18 100 | − | X | ) |
| ( | X | − | 16 100 | ) | = | 160 | ÷ | 50 | × | ( | 18 100 | − | X | ) |
| X | − | 16 100 | = | 160 | ÷ | 50 | × | ( | 18 100 | − | X | ) |
| X | − | 16 100 | = | 160 | ÷ | 50 | × | 18 100 | − | 160 | ÷ | 50 | × | X |
| X | − | 16 100 | = | 72 125 | − | 16 5 | X |
| X | + | 16 5 | X | = | 72 125 | + | 16 100 |
21 5 | X | = | 72 125 | + | 16 100 |
21 5 | X | = | 92 125 |
| X | = | 92 125 | ÷ | 21 5 |
| = | 92 125 | × | 5 21 |
| = | 92 25 | × | 1 21 |
| X | = | 92 525 |
| X | = | 0.175238 |