| X | − | ( | ( | 13779 | + | X | − | 20000 | ) | × | 3 100 | ) | = | 7572 |
| Left side of the equation = | X | − | ( | 13779 | + | X | − | 20000 | ) | × | 3 100 |
| = | X | − | 13779 | × | 3 100 | − | X | × | 3 100 | + | 20000 | × | 3 100 |
| = | X | − | 41337 100 | − | X | × | 3 100 | + | 600 |
| = | 97 100 | X | + | 18663 100 |
97 100 | X | + | 18663 100 | = | 7572 |
97 100 | X | = | 7572 | − | 18663 100 |
97 100 | X | = | 738537 100 |
| X | = | 738537 100 | ÷ | 97 100 |
| = | 738537 100 | × | 100 97 |
| = | 738537 | × | 1 97 |
| X | = | 738537 97 |
| X | = | 7613.783505 |