7500 | ÷ | x | + | 30000 | ÷ | ( | x | + | 60 | ) | = | 150 |
方程两边同时乘以: | x |
7500 | + | 30000 | ÷ | ( | x | + | 60 | ) | × | x | = | 150 | x |
方程两边同时乘以: | ( | x | + | 60 | ) |
7500 | ( | x | + | 60 | ) | + | 30000 | x | = | 150 | x | ( | x | + | 60 | ) |
7500 | x | + | 7500 | × | 60 | + | 30000 | x | = | 150 | x | ( | x | + | 60 | ) |
7500 | x | + | 7500 | × | 60 | + | 30000 | x | = | 150 | x | x | + | 150 | x | × | 60 |
7500 | x | + | 450000 | + | 30000 | x | = | 150 | x | x | + | 9000 | x |
37500 | x | + | 450000 | = | 150 | x | x | + | 9000 | x |