( | 3 | x | + | 2 | ) | × | 2 | − | 8 | ( | 3 | x | + | 2 | ) | + | 15 | = | 0 |
方程左边 = | 3 | x | × | 2 | + | 2 | × | 2 | − | 8 | ( | 3 | x | + | 2 | ) | + | 15 |
= | 6 | x | + | 4 | − | 8 | ( | 3 | x | + | 2 | ) | + | 15 |
= | 6 | x | + | 19 | − | 8 | ( | 3 | x | + | 2 | ) |
= | 6 | x | + | 19 | − | 8 | × | 3 | x | − | 8 | × | 2 |
= | 6 | x | + | 19 | − | 24 | x | − | 16 |
= | - | 18 | x | + | 3 |
- | 18 | x | + | 3 | = | 0 |
- | 18 | x | = | 0 | − | 3 |
- | 18 | x | = | - | 3 |
3 | = | 18 | x |
18 | x | = | 3 |
x | = | 3 | ÷ | 18 |
= | 3 | × | 1 18 |
= | 1 | × | 1 6 |
x | = | 1 6 |
x | = | 0.166667 |