| ( | 7 100 | − | x | ) | ÷ | ( | 7 100 | − | 3 50 | ) | = | ( | 20501 5000 | − | 21 5 | ) | ÷ | ( | 20501 5000 | − | 10531 2500 | ) |
| Multiply both sides of the equation by: | ( | 7 100 | − | 3 50 | ) | , | ( | 20501 5000 | − | 10531 2500 | ) |
| ( | 7 100 | − | x | ) | ( | 20501 5000 | − | 10531 2500 | ) | = | ( | 20501 5000 | − | 21 5 | ) | ( | 7 100 | − | 3 50 | ) |
7 100 | ( | 20501 5000 | − | 10531 2500 | ) | − | x | ( | 20501 5000 | − | 10531 2500 | ) | = | ( | 20501 5000 | − | 21 5 | ) | ( | 7 100 | − | 3 50 | ) |
7 100 | ( | 20501 5000 | − | 10531 2500 | ) | − | x | ( | 20501 5000 | − | 10531 2500 | ) | = | 20501 5000 | ( | 7 100 | − | 3 50 | ) | − | 21 5 | ( | 7 100 | − | 3 50 | ) |
7 100 | × | 20501 5000 | − | 7 100 | × | 10531 2500 | − | x | ( | 20501 5000 | − | 10531 2500 | ) | = | 20501 5000 | ( | 7 100 | − | 3 50 | ) | − | 21 5 | ( | 7 100 | − | 3 50 | ) |
7 100 | × | 20501 5000 | − | 7 100 | × | 10531 2500 | − | x | ( | 20501 5000 | − | 10531 2500 | ) | = | 20501 5000 | × | 7 100 | − | 20501 5000 | × | 3 50 | − | 21 5 | ( | 7 100 | − | 3 50 | ) |
143507 500000 | − | 73717 250000 | − | x | ( | 20501 5000 | − | 10531 2500 | ) | = | 143507 500000 | − | 61503 250000 | − | 21 5 | ( | 7 100 | − | 3 50 | ) |