30000 | ÷ | ( | x | + | 60 | ) | = | 10000 | ÷ | 70 |
方程两边同时乘以: | ( | x | + | 60 | ) |
30000 | = | 10000 | ÷ | 70 | × | ( | x | + | 60 | ) |
30000 | = | 10000 | ÷ | 70 | × | x | + | 10000 | ÷ | 70 | × | 60 |
30000 | = | 1000 7 | x | + | 60000 7 |
- | 1000 7 | x | = | 60000 7 | − | 30000 |
- | 1000 7 | x | = | - | 150000 7 |
150000 7 | = | 1000 7 | x |
1000 7 | x | = | 150000 7 |
x | = | 150000 7 | ÷ | 1000 7 |
= | 150000 7 | × | 7 1000 |
= | 150 | × | 1 |
x | = | 150 |