1700 | ( | x | − | 500 | ) | = | 2200 | ( | x | − | 400 | ) |
方程左边 = | 1700 | x | − | 1700 | × | 500 |
= | 1700 | x | − | 850000 |
1700 | x | − | 850000 | = | 2200 | ( | x | − | 400 | ) |
方程右边 = | 2200 | x | − | 2200 | × | 400 |
= | 2200 | x | − | 880000 |
1700 | x | − | 850000 | = | 2200 | x | − | 880000 |
1700 | x | − | 2200 | x | = | - | 880000 | + | 850000 |
- | 500 | x | = | - | 880000 | + | 850000 |
- | 500 | x | = | - | 30000 |
30000 | = | 500 | x |
500 | x | = | 30000 |
x | = | 30000 | ÷ | 500 |
= | 30000 | × | 1 500 |
= | 60 | × | 1 |
x | = | 60 |