| ( | ( | 280 | − | x | ) | + | 280 | × | 4 5 | ) | ÷ | ( | x | − | 25 | ) | = | 152 | ÷ | 153 |
| Multiply both sides of the equation by: | ( | x | − | 25 | ) |
| ( | ( | 280 | − | x | ) | + | 280 | × | 4 5 | ) | = | 152 | ÷ | 153 | × | ( | x | − | 25 | ) |
| ( | 280 | − | x | ) | + | 280 | × | 4 5 | = | 152 | ÷ | 153 | × | ( | x | − | 25 | ) |
| ( | 280 | − | x | ) | + | 280 | × | 4 5 | = | 152 | ÷ | 153 | × | x | − | 152 | ÷ | 153 | × | 25 |
| ( | 280 | − | x | ) | + | 224 | = | 152 153 | x | − | 3800 153 |
| 280 | − | x | + | 224 | = | 152 153 | x | − | 3800 153 |
| 504 | − | x | = | 152 153 | x | − | 3800 153 |
| - | x | − | 152 153 | x | = | - | 3800 153 | − | 504 |
| - | 305 153 | x | = | - | 3800 153 | − | 504 |
| - | 305 153 | x | = | - | 80912 153 |
80912 153 | = | 305 153 | x |
305 153 | x | = | 80912 153 |
| x | = | 80912 153 | ÷ | 305 153 |
| = | 80912 153 | × | 153 305 |
| = | 80912 | × | 1 305 |
| x | = | 80912 305 |
| x | = | 265.285246 |