| 20 | ( | 1 | ÷ | x | + | 32 | + | 1 | ÷ | x | + | 12 | ) | + | ( | x | + | 32 | ) | ( | x | − | 18 | ) | = | 1 |
| 20 | × | 1 | ÷ | x | + | 20 | × | 32 | + | 20 | × | 1 | ÷ | x | + | 20 | × | 12 | + | ( | x | + | 32 | ) | ( | x | − | 18 | ) | = | 1 |
| 20 | ÷ | x | + | 640 | + | 20 | ÷ | x | + | 240 | + | ( | x | + | 32 | ) | ( | x | − | 18 | ) | = | 1 |
| 20 | ÷ | x | + | 880 | + | 20 | ÷ | x | + | ( | x | + | 32 | ) | ( | x | − | 18 | ) | = | 1 |
| Multiply both sides of the equation by: | x |
| 20 | + | 880 | x | + | 20 | ÷ | 1 | × | 1 | + | ( | x | + | 32 | ) | ( | x | − | 18 | ) | x | = | 1 | x |
| 20 | + | 880 | x | + | 20 | ÷ | 1 | × | 1 | + | x | ( | x | − | 18 | ) | x | + | 32 | ( | x | − | 18 | ) | x | = | 1 | x |
| 20 | + | 880 | x | + | 20 | + | x | ( | x | − | 18 | ) | x | + | 32 | ( | x | − | 18 | ) | x | = | 1 | x |
| 40 | + | 880 | x | + | x | ( | x | − | 18 | ) | x | + | 32 | ( | x | − | 18 | ) | x | = | 1 | x |
| 40 | + | 880 | x | + | x | x | x | − | x | × | 18 | x | + | 32 | ( | x | − | 18 | ) | x | = | 1 | x |
| 40 | + | 880 | x | + | x | x | x | − | x | × | 18 | x | + | 32 | x | x | = | 1 | x |
| 40 | + | 880 | x | + | x | x | x | − | x | × | 18 | x | + | 32 | x | x | = | 1 | x |
| 40 | + | 304 | x | + | x | x | x | − | x | × | 18 | x | + | 32 | x | x | = | 1 | x |