2 | ( | x | + | 1 | ) | + | ( | x | − | 2 | ) | ÷ | 3 | = | 7 | x | ÷ | 2 | − | 1 |
方程左边 = | 2 | x | + | 2 | × | 1 | + | ( | x | − | 2 | ) | × | 1 3 |
= | 2 | x | + | 2 | + | ( | x | − | 2 | ) | × | 1 3 |
= | 2 | x | + | 2 | + | x | × | 1 3 | − | 2 | × | 1 3 |
= | 2 | x | + | 2 | + | x | × | 1 3 | − | 2 3 |
= | 7 3 | x | + | 4 3 |
7 3 | x | + | 4 3 | = | 7 | x | ÷ | 2 | − | 1 |
方程右边 = | 7 2 | x | − | 1 |
7 3 | x | + | 4 3 | = | 7 2 | x | − | 1 |
7 3 | x | − | 7 2 | x | = | - | 1 | − | 4 3 |
- | 7 6 | x | = | - | 1 | − | 4 3 |
- | 7 6 | x | = | - | 7 3 |
7 3 | = | 7 6 | x |
7 6 | x | = | 7 3 |
x | = | 7 3 | ÷ | 7 6 |
= | 7 3 | × | 6 7 |
= | 1 | × | 2 |
x | = | 2 |