1 | ÷ | 3 | × | ( | x | + | 7 | ) | = | 2 | ÷ | 5 | − | 1 | ÷ | 2 | × | ( | x | − | 5 | ) |
方程左边 = | 1 3 | ( | x | + | 7 | ) |
1 3 | ( | x | + | 7 | ) | = | 2 | ÷ | 5 | − | 1 | ÷ | 2 | × | ( | x | − | 5 | ) |
方程左边 = | 1 3 | x | + | 1 3 | × | 7 |
= | 1 3 | x | + | 7 3 |
1 3 | x | + | 7 3 | = | 2 | ÷ | 5 | − | 1 | ÷ | 2 | × | ( | x | − | 5 | ) |
方程右边 = | 2 5 | − | 1 2 | ( | x | − | 5 | ) |
1 3 | x | + | 7 3 | = | 2 5 | − | 1 2 | ( | x | − | 5 | ) |
方程右边 = | 2 5 | − | 1 2 | x | + | 1 2 | × | 5 |
= | 2 5 | − | 1 2 | x | + | 5 2 |
= | 29 10 | − | 1 2 | x |
1 3 | x | + | 7 3 | = | 29 10 | − | 1 2 | x |
1 3 | x | + | 1 2 | x | = | 29 10 | − | 7 3 |
5 6 | x | = | 29 10 | − | 7 3 |
5 6 | x | = | 17 30 |
x | = | 17 30 | ÷ | 5 6 |
= | 17 30 | × | 6 5 |
= | 17 5 | × | 1 5 |
x | = | 17 25 |
x | = | 0.68 |