| ( | 1092 | − | 240 | x | ) | ÷ | ( | 1092 | − | 420 | x | ) | = | 3 | ÷ | 2 |
| Multiply both sides of the equation by: | ( | 1092 | − | 420 | x | ) |
| ( | 1092 | − | 240 | x | ) | = | 3 | ÷ | 2 | × | ( | 1092 | − | 420 | x | ) |
| 1092 | − | 240 | x | = | 3 | ÷ | 2 | × | ( | 1092 | − | 420 | x | ) |
| 1092 | − | 240 | x | = | 3 | ÷ | 2 | × | 1092 | − | 3 | ÷ | 2 | × | 420 | x |
| 1092 | − | 240 | x | = | 1638 | − | 630 | x |
| - | 240 | x | + | 630 | x | = | 1638 | − | 1092 |
| 390 | x | = | 1638 | − | 1092 |
| 390 | x | = | 546 |
| x | = | 546 | ÷ | 390 |
| = | 546 | × | 1 390 |
| = | 7 | × | 1 5 |
| x | = | 7 5 |
| x | = | 1.4 |