3 | ÷ | x | − | 3 | ÷ | ( | 20 | + | x | ) | = | 12 25 |
方程两边同时乘以: | x |
3 | − | 3 | ÷ | ( | 20 | + | x | ) | × | x | = | 12 25 | x |
方程两边同时乘以: | ( | 20 | + | x | ) |
3 | ( | 20 | + | x | ) | − | 3 | x | = | 12 25 | x | ( | 20 | + | x | ) |
3 | × | 20 | + | 3 | x | − | 3 | x | = | 12 25 | x | ( | 20 | + | x | ) |
3 | × | 20 | + | 3 | x | − | 3 | x | = | 12 25 | x | × | 20 | + | 12 25 | x | x |
60 | + | 3 | x | − | 3 | x | = | 48 5 | x | + | 12 25 | x | x |
60 | + | 0 | x | = | 48 5 | x | + | 12 25 | x | x |