| 1 | ÷ | d | + | 1 | ÷ | ( | 2 | + | d | ) | = | 2 | ÷ | d |
| Multiply both sides of the equation by: | d |
| 1 | + | 1 | ÷ | ( | 2 | + | d | ) | × | d | = | 2 | ÷ | 1 | × | 1 |
| Multiply both sides of the equation by: | ( | 2 | + | d | ) |
| 1 | ( | 2 | + | d | ) | + | 1 | d | = | 2 | ÷ | 1 | × | 1 | ( | 2 | + | d | ) |
| 1 | × | 2 | + | 1 | d | + | 1 | d | = | 2 | ÷ | 1 | × | 1 | ( | 2 | + | d | ) |
| 1 | × | 2 | + | 1 | d | + | 1 | d | = | 2 | ÷ | 1 | × | 1 | × | 2 | + | 2 | ÷ | 1 | × | 1 | d |
| 2 | + | 1 | d | + | 1 | d | = | 4 | + | 2 | d |
| 2 | + | 2 | d | = | 4 | + | 2 | d |
| 2 | d | − | 2 | d | = | 4 | − | 2 |
| 0 | d | = | 4 | − | 2 |
| 0 | d | = | 2 |