( | 1 | + | 2 | x | ) | ÷ | 3 | + | ( | x | − | 2 | ) | = | x | − | 1 |
方程左边 = | 1 | × | 1 3 | + | 2 | x | × | 1 3 | + | ( | x | − | 2 | ) |
= | 1 3 | + | 2 3 | x | + | ( | x | − | 2 | ) |
= | 1 3 | + | 2 3 | x | + | x | − | 2 |
= | - | 5 3 | + | 5 3 | x |
- | 5 3 | + | 5 3 | x | = | x | − | 1 |
5 3 | x | − | x | = | - | 1 | + | 5 3 |
2 3 | x | = | - | 1 | + | 5 3 |
2 3 | x | = | 2 3 |
x | = | 2 3 | ÷ | 2 3 |
= | 2 3 | × | 3 2 |
= | 1 | × | 1 |
x | = | 1 |