| 65000 | + | x | − | ( | x | × | 8 100 | ) | ÷ | 4 | = | 80000 |
| Left side of the equation = | 65000 | + | x | − | x | × | 8 100 | × | 1 4 |
| = | 65000 | + | x | − | x | × | 1 50 |
| = | 65000 | + | 49 50 | x |
| 65000 | + | 49 50 | x | = | 80000 |
49 50 | x | = | 80000 | − | 65000 |
49 50 | x | = | 15000 |
| x | = | 15000 | ÷ | 49 50 |
| = | 15000 | × | 50 49 |
| x | = | 750000 49 |
| x | = | 15306.122449 |