( | x | + | 18 | ) | ÷ | ( | x | − | 18 | ) | = | 74 | ÷ | 65 |
方程两边同时乘以: | ( | x | − | 18 | ) |
( | x | + | 18 | ) | = | 74 | ÷ | 65 | × | ( | x | − | 18 | ) |
x | + | 18 | = | 74 | ÷ | 65 | × | ( | x | − | 18 | ) |
x | + | 18 | = | 74 | ÷ | 65 | × | x | − | 74 | ÷ | 65 | × | 18 |
x | + | 18 | = | 74 65 | x | − | 1332 65 |
x | − | 74 65 | x | = | - | 1332 65 | − | 18 |
- | 9 65 | x | = | - | 1332 65 | − | 18 |
- | 9 65 | x | = | - | 2502 65 |
2502 65 | = | 9 65 | x |
9 65 | x | = | 2502 65 |
x | = | 2502 65 | ÷ | 9 65 |
= | 2502 65 | × | 65 9 |
= | 278 | × | 1 |
x | = | 278 |