| 50000 | = | 1800 | − | 50000 | ( | x | − | 50 | ) |
| Right side of the equation = | 1800 | − | 50000 | x | + | 50000 | × | 50 |
| = | 1800 | − | 50000 | x | + | 2500000 |
| = | 2501800 | − | 50000 | x |
| 50000 | = | 2501800 | − | 50000 | x |
| 50000 | x | = | 2501800 | − | 50000 |
| 50000 | x | = | 2451800 |
| x | = | 2451800 | ÷ | 50000 |
| = | 2451800 | × | 1 50000 |
| = | 12259 | × | 1 250 |
| x | = | 12259 250 |
| x | = | 49.036 |