| ( | ( | 1 | + | a | ) | ( | 1 | + | a | ) | ( | 1 | + | a | ) | − | 1 | ) | ÷ | a | = | 82 25 |
| Multiply both sides of the equation by: | a |
| ( | ( | 1 | + | a | ) | ( | 1 | + | a | ) | ( | 1 | + | a | ) | − | 1 | ) | = | 82 25 | a |
| ( | 1 | + | a | ) | ( | 1 | + | a | ) | ( | 1 | + | a | ) | − | 1 | = | 82 25 | a |
| 1 | ( | 1 | + | a | ) | ( | 1 | + | a | ) | + | a | ( | 1 | + | a | ) | ( | 1 | + | a | ) | − | 1 | = | 82 25 | a |
| 1 | × | 1 | ( | 1 | + | a | ) | + | 1 | a | ( | 1 | + | a | ) | + | a | ( | 1 | + | a | ) | ( | 1 | + | a | ) | − | 1 | = | 82 25 | a |
| 1 | ( | 1 | + | a | ) | + | 1 | a | ( | 1 | + | a | ) | + | a | ( | 1 | + | a | ) | ( | 1 | + | a | ) | − | 1 | = | 82 25 | a |
| 1 | × | 1 | + | 1 | a | + | 1 | a | ( | 1 | + | a | ) | + | a | ( | 1 | + | a | ) | ( | 1 | + | a | ) | − | 1 | = | 82 25 | a |
| 1 | + | 1 | a | + | 1 | a | ( | 1 | + | a | ) | + | a | ( | 1 | + | a | ) | ( | 1 | + | a | ) | − | 1 | = | 82 25 | a |
| 0 | + | 1 | a | + | 1 | a | ( | 1 | + | a | ) | + | a | ( | 1 | + | a | ) | ( | 1 | + | a | ) | = | 82 25 | a |
| 1 | a | + | 1 | a | × | 1 | + | 1 | a | a | + | a | ( | 1 | + | a | ) | ( | 1 | + | a | ) | = | 82 25 | a |
| 1 | a | + | 1 | a | + | 1 | a | a | + | a | ( | 1 | + | a | ) | ( | 1 | + | a | ) | = | 82 25 | a |
| 2 | a | + | 1 | a | a | + | a | ( | 1 | + | a | ) | ( | 1 | + | a | ) | = | 82 25 | a |
| 2 | a | + | 1 | a | a | + | a | × | 1 | ( | 1 | + | a | ) | + | a | a | ( | 1 | + | a | ) | = | 82 25 | a |
| 2 | a | + | 1 | a | a | + | a | × | 1 | × | 1 | + | a | × | 1 | a | + | a | = | 82 25 | a |
| 2 | a | + | 1 | a | a | + | a | × | 1 | + | a | × | 1 | a | + | a | a | = | 82 25 | a |
| 3 | a | + | 1 | a | a | + | a | × | 1 | a | + | a | a | ( | 1 | + | a | ) | = | 82 25 | a |
| 3 | a | + | 1 | a | a | + | a | × | 1 | a | + | a | a | × | 1 | + | a | = | 82 25 | a |