| X | − | ( | X | − | ( | X | × | 20 100 | ) | ) | × | 20 100 | = | 208823 50 |
| Left side of the equation = | X | − | X | × | 20 100 | + | ( | X | × | 20 100 | ) | × | 20 100 |
| = | 4 5 | X | + | ( | X | × | 20 100 | ) | × | 20 100 |
| = | 4 5 | X | + | X | × | 20 100 | × | 20 100 |
| = | 4 5 | X | + | X | × | 1 25 |
| = | 21 25 | X |
21 25 | X | = | 208823 50 |
| X | = | 208823 50 | ÷ | 21 25 |
| = | 208823 50 | × | 25 21 |
| = | 208823 2 | × | 1 21 |
| X | = | 208823 42 |
| X | = | 4971.97619 |