| ( | x | − | 18 100 | ) | ÷ | ( | 20 100 | − | 18 100 | ) | = | ( | 26667 10000 | − | 26901 10000 | ) | ÷ | ( | 25887 10000 | − | 26901 10000 | ) |
| Multiply both sides of the equation by: | ( | 20 100 | − | 18 100 | ) | , | ( | 25887 10000 | − | 26901 10000 | ) |
| ( | x | − | 18 100 | ) | ( | 25887 10000 | − | 26901 10000 | ) | = | ( | 26667 10000 | − | 26901 10000 | ) | ( | 20 100 | − | 18 100 | ) |
| x | ( | 25887 10000 | − | 26901 10000 | ) | − | 18 100 | ( | 25887 10000 | − | 26901 10000 | ) | = | ( | 26667 10000 | − | 26901 10000 | ) | ( | 20 100 | − | 18 100 | ) |
| x | ( | 25887 10000 | − | 26901 10000 | ) | − | 18 100 | ( | 25887 10000 | − | 26901 10000 | ) | = | 26667 10000 | ( | 20 100 | − | 18 100 | ) | − | 26901 10000 | ( | 20 100 | − | 18 100 | ) |
| x | × | 25887 10000 | − | x | × | 26901 10000 | − | 18 100 | ( | 25887 10000 | − | 26901 10000 | ) | = | 26667 10000 | ( | 20 100 | − | 18 100 | ) | − | 26901 10000 | ( | 20 100 | − | 18 100 | ) |
| x | × | 25887 10000 | − | x | × | 26901 10000 | − | 18 100 | ( | 25887 10000 | − | 26901 10000 | ) | = | 26667 10000 | × | 20 100 | − | 26667 10000 | × | 18 100 | − | 26901 10000 | ( | 20 100 | − | 18 100 | ) |
| x | × | 25887 10000 | − | x | × | 26901 10000 | − | 18 100 | ( | 25887 10000 | − | 26901 10000 | ) | = | 26667 50000 | − | 240003 500000 | − | 26901 10000 | ( | 20 100 | − | 18 100 | ) |