20000 | ÷ | x | + | 40000 | ÷ | ( | x | + | 60 | ) | = | 250 |
方程两边同时乘以: | x |
20000 | + | 40000 | ÷ | ( | x | + | 60 | ) | × | x | = | 250 | x |
方程两边同时乘以: | ( | x | + | 60 | ) |
20000 | ( | x | + | 60 | ) | + | 40000 | x | = | 250 | x | ( | x | + | 60 | ) |
20000 | x | + | 20000 | × | 60 | + | 40000 | x | = | 250 | x | ( | x | + | 60 | ) |
20000 | x | + | 20000 | × | 60 | + | 40000 | x | = | 250 | x | x | + | 250 | x | × | 60 |
20000 | x | + | 1200000 | + | 40000 | x | = | 250 | x | x | + | 15000 | x |
60000 | x | + | 1200000 | = | 250 | x | x | + | 15000 | x |