| 50000 | x | ( | 1 | − | 5 100 | ) | − | 50000 | × | 11 | − | 67500 | = | 0 |
| Left side of the equation = | 50000 | x | ( | 1 | − | 5 100 | ) | − | 550000 | − | 67500 |
| = | 50000 | x | ( | 1 | − | 5 100 | ) | − | 617500 |
| 50000 | x | ( | 1 | − | 5 100 | ) | − | 617500 | = | 0 |
| Left side of the equation = | 50000 | x | × | 1 | − | 50000 | x | × | 5 100 | − | 617500 |
| = | 50000 | x | − | 2500 | x | − | 617500 |
| = | 47500 | x | − | 617500 |
| 47500 | x | − | 617500 | = | 0 |
| 47500 | x | = | 0 | + | 617500 |
| 47500 | x | = | 617500 |
| x | = | 617500 | ÷ | 47500 |
| = | 617500 | × | 1 47500 |
| = | 13 | × | 1 |
| x | = | 13 |