| ( | x | − | 280 | ) | ÷ | ( | x | + | 602 | − | 280 | ) | = | 11 20 | x | ÷ | ( | 11 20 | x | + | 602 | ) |
| Multiply both sides of the equation by: | ( | x | + | 602 | − | 280 | ) | , | ( | 11 20 | x | + | 602 | ) |
| ( | x | − | 280 | ) | ( | 11 20 | x | + | 602 | ) | = | 11 20 | x | ( | x | + | 602 | − | 280 | ) |
| x | ( | 11 20 | x | + | 602 | ) | − | 280 | ( | 11 20 | x | + | 602 | ) | = | 11 20 | x | ( | x | + | 602 | − | 280 | ) |
| x | ( | 11 20 | x | + | 602 | ) | − | 280 | ( | 11 20 | x | + | 602 | ) | = | 11 20 | x | x | + | 11 20 | x | × | 602 | − | 11 20 | x | × | 280 |
| x | ( | 11 20 | x | + | 602 | ) | − | 280 | ( | 11 20 | x | + | 602 | ) | = | 11 20 | x | x | + | 3311 10 | x | − | 154 | x |
| x | ( | 11 20 | x | + | 602 | ) | − | 280 | ( | 11 20 | x | + | 602 | ) | = | 11 20 | x | x | + | 1771 10 | x |
| x | × | 11 20 | x | + | x | × | 602 | − | 280 | ( | 11 20 | x | + | 602 | ) | = | 11 20 | x | x | + | 1771 10 | x |
| x | × | 11 20 | x | + | 602 | x | − | 280 | × | 11 20 | x | − | 280 | × | 602 | = | 11 20 | x | x | + | 1771 10 | x |
| x | × | 11 20 | x | + | 602 | x | − | 154 | x | − | 168560 | = | 11 20 | x | x | + | 1771 10 | x |
| x | × | 11 20 | x | + | 448 | x | − | 168560 | = | 11 20 | x | x | + | 1771 10 | x |