30000 | ÷ | x | + | 80000 | ÷ | ( | x | + | 60 | ) | = | 550 |
方程两边同时乘以: | x |
30000 | + | 80000 | ÷ | ( | x | + | 60 | ) | × | x | = | 550 | x |
方程两边同时乘以: | ( | x | + | 60 | ) |
30000 | ( | x | + | 60 | ) | + | 80000 | x | = | 550 | x | ( | x | + | 60 | ) |
30000 | x | + | 30000 | × | 60 | + | 80000 | x | = | 550 | x | ( | x | + | 60 | ) |
30000 | x | + | 30000 | × | 60 | + | 80000 | x | = | 550 | x | x | + | 550 | x | × | 60 |
30000 | x | + | 1800000 | + | 80000 | x | = | 550 | x | x | + | 33000 | x |
110000 | x | + | 1800000 | = | 550 | x | x | + | 33000 | x |