| a | ÷ | ( | 1 | + | a | ) | ÷ | ( | 1 | + | a | ÷ | ( | 1 | + | a | ) | ) | ÷ | ( | 1 | + | a | ÷ | ( | 1 | + | a | ) | ÷ | ( | 1 | + | a | ÷ | ( | 1 | + | a | ) | ) | ) | = | 0 |
| Multiply both sides of the equation by: | ( | 1 | + | a | ) |
| a | ÷ | ( | 1 | + | a | ÷ | ( | 1 | + | a | ) | ) | ÷ | ( | 1 | + | a | ÷ | ( | 1 | + | a | ) | ÷ | ( | 1 | + | a | ÷ | ( | 1 | + | a | ) | ) | ) | = | 0 |
| Multiply both sides of the equation by: | ( | 1 | + | a | ÷ | ( | 1 | + | a | ) | ) |
| a | ÷ | ( | 1 | + | a | ÷ | ( | 1 | + | a | ) | ÷ | ( | 1 | + | a | ÷ | ( | 1 | + | a | ) | ) | ) | = | 0 |
| Multiply both sides of the equation by: | ( | 1 | + | a | ÷ | ( | 1 | + | a | ) | ÷ | ( | 1 | + | a | ÷ | ( | 1 | + | a | ) | ) | ) |
| a | = | 0 |