( | 2 | x | + | 5 | ) | ÷ | ( | 3 | x | + | 7 | ) | = | 5 | ÷ | 9 |
方程两边同时乘以: | ( | 3 | x | + | 7 | ) |
( | 2 | x | + | 5 | ) | = | 5 | ÷ | 9 | × | ( | 3 | x | + | 7 | ) |
2 | x | + | 5 | = | 5 | ÷ | 9 | × | ( | 3 | x | + | 7 | ) |
2 | x | + | 5 | = | 5 | ÷ | 9 | × | 3 | x | + | 5 | ÷ | 9 | × | 7 |
2 | x | + | 5 | = | 5 3 | x | + | 35 9 |
2 | x | − | 5 3 | x | = | 35 9 | − | 5 |
1 3 | x | = | 35 9 | − | 5 |
1 3 | x | = | - | 10 9 |
x | = | - | 10 9 | ÷ | 1 3 |
= | - | 10 9 | × | 3 |
= | - | 10 3 | × | 1 |
x | = | - | 10 3 |
x | = | - 3.333333 |