( | 3 | x | + | 4 | ) | ÷ | ( | 5 | x | + | 2 | ) | = | 5 | ÷ | 9 |
方程两边同时乘以: | ( | 5 | x | + | 2 | ) |
( | 3 | x | + | 4 | ) | = | 5 | ÷ | 9 | × | ( | 5 | x | + | 2 | ) |
3 | x | + | 4 | = | 5 | ÷ | 9 | × | ( | 5 | x | + | 2 | ) |
3 | x | + | 4 | = | 5 | ÷ | 9 | × | 5 | x | + | 5 | ÷ | 9 | × | 2 |
3 | x | + | 4 | = | 25 9 | x | + | 10 9 |
3 | x | − | 25 9 | x | = | 10 9 | − | 4 |
2 9 | x | = | 10 9 | − | 4 |
2 9 | x | = | - | 26 9 |
x | = | - | 26 9 | ÷ | 2 9 |
= | - | 26 9 | × | 9 2 |
= | - | 13 | × | 1 |
x | = | - | 13 |