( | x | − | 2 | ) | + | ( | x | + | 2 | ) | + | x | ÷ | 2 | + | 2 | x | = | 45 |
方程左边 = | ( | x | − | 2 | ) | + | ( | x | + | 2 | ) | + | 5 2 | x |
( | x | − | 2 | ) | + | ( | x | + | 2 | ) | + | 5 2 | x | = | 45 |
方程左边 = | x | − | 2 | + | ( | x | + | 2 | ) | + | 5 2 | x |
= | 7 2 | x | − | 2 | + | ( | x | + | 2 | ) |
= | 7 2 | x | − | 2 | + | x | + | 2 |
= | 9 2 | x | − | 0 |
9 2 | x | = | 45 |
x | = | 45 | ÷ | 9 2 |
= | 45 | × | 2 9 |
= | 5 | × | 2 |
x | = | 10 |