| ( | 11 | x | ÷ | 5 | ) | ÷ | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) | = | ( | 5 | − | ( | 11 | x | ÷ | 5 | ) | ) | ÷ | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) |
| Multiply both sides of the equation by: | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) | , | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) |
| ( | 11 | x | ÷ | 5 | ) | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) | = | ( | 5 | − | ( | 11 | x | ÷ | 5 | ) | ) | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) |
| 11 | x | ÷ | 5 | × | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) | = | ( | 5 | − | ( | 11 | x | ÷ | 5 | ) | ) | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) |
| 11 | x | ÷ | 5 | × | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) | = | 5 | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) | − | ( | 11 | x | ÷ | 5 | ) | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) |
11 5 | x | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) | = | 5 | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) | − | ( | 11 | x | ÷ | 5 | ) | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) |
11 5 | x | ( | 12 | − | 3 | x | ) | ÷ | 5 | = | 5 | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) | − | ( | 11 | x | ÷ | 5 | ) | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) |
11 5 | x | ( | 12 | − | 3 | x | ) | ÷ | 5 | = | 5 | ( | 12 | − | 3 | x | ) | ÷ | 5 | − | ( | 11 | x | ÷ | 5 | ) | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) |
11 25 | x | ( | 12 | − | 3 | x | ) | = | 1 | ( | 12 | − | 3 | x | ) | − | ( | 11 | x | ÷ | 5 | ) | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) |
11 25 | x | × | 12 | − | 11 25 | x | × | 3 | x | = | 1 | ( | 12 | − | 3 | x | ) | − | ( | 11 | x | ÷ | 5 | ) | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) |
11 25 | x | × | 12 | − | 11 25 | x | × | 3 | x | = | 1 | × | 12 | − | 1 | × | 3 | x | − | ( | 11 | x | ÷ | 5 | ) | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) |
132 25 | x | − | 33 25 | x | x | = | 12 | − | 3 | x | − | ( | 11 | x | ÷ | 5 | ) | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) |
132 25 | x | − | 33 25 | x | x | = | 12 | − | 3 | x | − | 11 | x | ÷ | 5 | × | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) |
132 25 | x | − | 33 25 | x | x | = | 12 | − | 3 | x | − | 11 5 | x | ( | ( | 12 | − | 3 | x | ) | ÷ | 5 | ) |
132 25 | x | − | 33 25 | x | x | = | 12 | − | 3 | x | − | 11 5 | x | ( | 12 | − | 3 | x | ) | ÷ | 5 |
132 25 | x | − | 33 25 | x | x | = | 12 | − | 3 | x | − | 11 25 | x | ( | 12 | − | 3 | x | ) |
132 25 | x | − | 33 25 | x | x | = | 12 | − | 3 | x | − | 11 25 | x | × | 12 | + | 11 25 | x | × | 3 | x |
132 25 | x | − | 33 25 | x | x | = | 12 | − | 3 | x | − | 132 25 | x | + | 33 25 | x | x |
132 25 | x | − | 33 25 | x | x | = | 12 | − | 207 25 | x | + | 33 25 | x | x |
| x1= | 25 22 |