4 | ( | 7 | + | x | ) | ÷ | 6 | = | 2 | × | 8 | + | 5 | − | x |
方程左边 = | 2 3 | ( | 7 | + | x | ) |
2 3 | ( | 7 | + | x | ) | = | 2 | × | 8 | + | 5 | − | x |
方程左边 = | 2 3 | × | 7 | + | 2 3 | x |
= | 14 3 | + | 2 3 | x |
14 3 | + | 2 3 | x | = | 2 | × | 8 | + | 5 | − | x |
方程右边 = | 16 | + | 5 | − | x |
= | 21 | − | x |
14 3 | + | 2 3 | x | = | 21 | − | x |
2 3 | x | + | x | = | 21 | − | 14 3 |
5 3 | x | = | 21 | − | 14 3 |
5 3 | x | = | 49 3 |
x | = | 49 3 | ÷ | 5 3 |
= | 49 3 | × | 3 5 |
= | 49 | × | 1 5 |
x | = | 49 5 |
x | = | 9.8 |