2 | x | + | 38 | = | ( | 8 | ÷ | 7 | ) | ( | 167 2 | + | x | ) |
方程右边 = | 8 | ÷ | 7 | × | ( | 167 2 | + | x | ) |
= | 8 7 | ( | 167 2 | + | x | ) |
= | 8 7 | × | 167 2 | + | 8 7 | x |
= | 668 7 | + | 8 7 | x |
2 | x | + | 38 | = | 668 7 | + | 8 7 | x |
2 | x | − | 8 7 | x | = | 668 7 | − | 38 |
6 7 | x | = | 668 7 | − | 38 |
6 7 | x | = | 402 7 |
x | = | 402 7 | ÷ | 6 7 |
= | 402 7 | × | 7 6 |
= | 67 | × | 1 |
x | = | 67 |