| ( | 11 | x | ÷ | 5 | ) | ÷ | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) | = | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) | ÷ | ( | 5 | − | ( | 11 | x | ÷ | 5 | ) | ) |
| Multiply both sides of the equation by: | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) | , | ( | 5 | − | ( | 11 | x | ÷ | 5 | ) | ) |
| ( | 11 | x | ÷ | 5 | ) | ( | 5 | − | ( | 11 | x | ÷ | 5 | ) | ) | = | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) |
| 11 | x | ÷ | 5 | × | ( | 5 | − | ( | 11 | x | ÷ | 5 | ) | ) | = | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) |
| 11 | x | ÷ | 5 | × | ( | 5 | − | ( | 11 | x | ÷ | 5 | ) | ) | = | ( | 12 | − | 3 | x | ) | ÷ | 5 | × | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) |
11 5 | x | ( | 5 | − | ( | 11 | x | ÷ | 5 | ) | ) | = | ( | 12 | − | 3 | x | ) | × | 1 5 | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) |
11 5 | x | × | 5 | − | 11 5 | x | ( | 11 | x | ÷ | 5 | ) | = | ( | 12 | − | 3 | x | ) | × | 1 5 | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) |
11 5 | x | × | 5 | − | 11 5 | x | ( | 11 | x | ÷ | 5 | ) | = | 12 | × | 1 5 | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) | − | 3 | x | × | 1 5 | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) |
| 11 | x | − | 11 5 | x | ( | 11 | x | ÷ | 5 | ) | = | 12 5 | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) | − | 3 5 | x | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) |
| 11 | x | − | 11 5 | x | × | 11 | x | ÷ | 5 | = | 12 5 | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) | − | 3 5 | x | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) |
| 11 | x | − | 11 5 | x | × | 11 | x | ÷ | 5 | = | 12 5 | ( | 12 | − | 3 | x | ) | ÷ | 5 | − | 3 5 | x | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) |
| 11 | x | − | 121 25 | x | x | = | 12 25 | ( | 12 | − | 3 | x | ) | − | 3 5 | x | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) |
| 11 | x | − | 121 25 | x | x | = | 12 25 | × | 12 | − | 12 25 | × | 3 | x | − | 3 5 | x | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) |
| 11 | x | − | 121 25 | x | x | = | 144 25 | − | 36 25 | x | − | 3 5 | x | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) |
| 11 | x | − | 121 25 | x | x | = | 144 25 | − | 36 25 | x | − | 3 5 | x | ( | 12 | − | 3 | x | ) | ÷ | 5 |
| 11 | x | − | 121 25 | x | x | = | 144 25 | − | 36 25 | x | − | 3 25 | x | ( | 12 | − | 3 | x | ) |
| 11 | x | − | 121 25 | x | x | = | 144 25 | − | 36 25 | x | − | 3 25 | x | × | 12 | + | 3 25 | x | × | 3 | x |
| 11 | x | − | 121 25 | x | x | = | 144 25 | − | 36 25 | x | − | 36 25 | x | + | 9 25 | x | x |
| 11 | x | − | 121 25 | x | x | = | 144 25 | − | 72 25 | x | + | 9 25 | x | x |