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