| ( | 42 | − | 3761 100 | ) | ÷ | ( | 42 | − | 35 | ) | = | ( | 19 20 | − | x | ) | ÷ | ( | 19 20 | − | 49 50 | ) |
| Multiply both sides of the equation by: | ( | 42 | − | 35 | ) | , | ( | 19 20 | − | 49 50 | ) |
| ( | 42 | − | 3761 100 | ) | ( | 19 20 | − | 49 50 | ) | = | ( | 19 20 | − | x | ) | ( | 42 | − | 35 | ) |
| 42 | ( | 19 20 | − | 49 50 | ) | − | 3761 100 | ( | 19 20 | − | 49 50 | ) | = | ( | 19 20 | − | x | ) | ( | 42 | − | 35 | ) |
| 42 | ( | 19 20 | − | 49 50 | ) | − | 3761 100 | ( | 19 20 | − | 49 50 | ) | = | 19 20 | ( | 42 | − | 35 | ) | − | x | ( | 42 | − | 35 | ) |
| 42 | × | 19 20 | − | 42 | × | 49 50 | − | 3761 100 | ( | 19 20 | − | 49 50 | ) | = | 19 20 | ( | 42 | − | 35 | ) | − | x | ( | 42 | − | 35 | ) |
| 42 | × | 19 20 | − | 42 | × | 49 50 | − | 3761 100 | ( | 19 20 | − | 49 50 | ) | = | 19 20 | × | 42 | − | 19 20 | × | 35 | − | x | ( | 42 | − | 35 | ) |
399 10 | − | 1029 25 | − | 3761 100 | ( | 19 20 | − | 49 50 | ) | = | 399 10 | − | 133 4 | − | x | ( | 42 | − | 35 | ) |
| - | 63 50 | − | 3761 100 | ( | 19 20 | − | 49 50 | ) | = | 133 20 | − | x | ( | 42 | − | 35 | ) |
| - | 63 50 | − | 3761 100 | × | 19 20 | + | 3761 100 | × | 49 50 | = | 133 20 | − | x | ( | 42 | − | 35 | ) |
| - | 63 50 | − | 3761 100 | × | 19 20 | + | 3761 100 | × | 49 50 | = | 133 20 | − | x | × | 42 | + | x | × | 35 |
| - | 63 50 | − | 71459 2000 | + | 184289 5000 | = | 133 20 | − | x | × | 42 | + | x | × | 35 |
| - | 1317 10000 | = | 133 20 | − | 7 | x |
| 7 | x | = | 133 20 | + | 1317 10000 |
| 7 | x | = | 67817 10000 |
| x | = | 67817 10000 | ÷ | 7 |
| = | 67817 10000 | × | 1 7 |
| x | = | 67817 70000 |
| x | = | 0.968814 |