| 63 | ÷ | ( | 1 | + | 1 | + | ( | 1 | ÷ | 3 | ) | ) | = | x |
| Multiply both sides of the equation by: | ( | 1 | + | 1 | + | ( | 1 | ÷ | 3 | ) | ) |
| 63 | = | x | ( | 1 | + | 1 | + | ( | 1 | ÷ | 3 | ) | ) |
| 63 | = | x | × | 1 | + | x | × | 1 | + | x | ( | 1 | ÷ | 3 | ) |
| 63 | = | 2 | x | + | x | ( | 1 | ÷ | 3 | ) |
| 63 | = | 2 | x | + | x | × | 1 | ÷ | 3 |
| 63 | = | 2 | x | + | x | × | 1 3 |
| 63 | = | 7 3 | x |
| - | 7 3 | x | = | - | 63 |
| 63 | = | 7 3 | x |
7 3 | x | = | 63 |
| x | = | 63 | ÷ | 7 3 |
| = | 63 | × | 3 7 |
| = | 9 | × | 3 |
| x | = | 27 |