| ( | 1 15625 | + | X | ) | ÷ | ( | 621 62500 | − | X | ) | = | 16218101 100000 |
| Multiply both sides of the equation by: | ( | 621 62500 | − | X | ) |
| ( | 1 15625 | + | X | ) | = | 16218101 100000 | ( | 621 62500 | − | X | ) |
1 15625 | + | X | = | 16218101 100000 | ( | 621 62500 | − | X | ) |
1 15625 | + | X | = | 16218101 100000 | × | 621 62500 | − | 16218101 100000 | X |