| X | − | ( | ( | X | − | 800 | ) | × | 20 100 | ) | − | ( | X | × | 51 5000 | ) | = | 2000 |
| Left side of the equation = | X | − | ( | X | − | 800 | ) | × | 20 100 | − | ( | X | × | 51 5000 | ) |
| = | X | − | X | × | 20 100 | + | 800 | × | 20 100 | − | ( | X | × | 51 5000 | ) |
| = | X | − | X | × | 20 100 | + | 160 | − | ( | X | × | 51 5000 | ) |
| = | 4 5 | X | + | 160 | − | ( | X | × | 51 5000 | ) |
| = | 4 5 | X | + | 160 | − | X | × | 51 5000 |
| = | 3949 5000 | X | + | 160 |
3949 5000 | X | + | 160 | = | 2000 |
3949 5000 | X | = | 2000 | − | 160 |
3949 5000 | X | = | 1840 |
| X | = | 1840 | ÷ | 3949 5000 |
| = | 1840 | × | 5000 3949 |
| X | = | 9200000 3949 |
| X | = | 2329.703722 |