18 100 | X | + | 13 100 | ÷ | ( | 1 | − | X | ) | = | 16 100 |
| Multiply both sides of the equation by: | ( | 1 | − | X | ) |
18 100 | X | ( | 1 | − | X | ) | + | 13 100 | = | 16 100 | ( | 1 | − | X | ) |
18 100 | X | × | 1 | − | 18 100 | X | X | + | 13 100 | = | 16 100 | ( | 1 | − | X | ) |
18 100 | X | × | 1 | − | 18 100 | X | X | + | 13 100 | = | 16 100 | × | 1 | − | 16 100 | X |
9 50 | X | − | 18 100 | X | X | + | 13 100 | = | 4 25 | − | 16 100 | X |