( | x | + | 15 | ) | ÷ | 3 | = | 5 | + | ( | x | + | 3 | ) | ÷ | 5 |
方程左边 = | x | × | 1 3 | + | 15 | × | 1 3 |
= | x | × | 1 3 | + | 5 |
1 3 | x | + | 5 | = | 5 | + | ( | x | + | 3 | ) | ÷ | 5 |
方程右边 = | 5 | + | x | × | 1 5 | + | 3 | × | 1 5 |
= | 5 | + | x | × | 1 5 | + | 3 5 |
= | 28 5 | + | 1 5 | x |
1 3 | x | + | 5 | = | 28 5 | + | 1 5 | x |
1 3 | x | − | 1 5 | x | = | 28 5 | − | 5 |
2 15 | x | = | 28 5 | − | 5 |
2 15 | x | = | 3 5 |
x | = | 3 5 | ÷ | 2 15 |
= | 3 5 | × | 15 2 |
= | 3 | × | 3 2 |
x | = | 9 2 |
x | = | 4.5 |