| - | 15000 | + | x | − | ( | x | × | 8 100 | ) | ÷ | 4 | = | 4500 |
| Left side of the equation = | - | 15000 | + | x | − | x | × | 8 100 | × | 1 4 |
| = | - | 15000 | + | x | − | x | × | 1 50 |
| = | - | 15000 | + | 49 50 | x |
| - | 15000 | + | 49 50 | x | = | 4500 |
49 50 | x | = | 4500 | + | 15000 |
49 50 | x | = | 19500 |
| x | = | 19500 | ÷ | 49 50 |
| = | 19500 | × | 50 49 |
| x | = | 975000 49 |
| x | = | 19897.959184 |