( | 1092 | − | 240 | x | ) | ÷ | ( | 1092 | − | 420 | x | ) | = | 3 | ÷ | 2 |
方程两边同时乘以: | ( | 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 |