12 | ( | x | − | 440 | ) | = | 17 | ( | x | − | 200 | ) |
方程左边 = | 12 | x | − | 12 | × | 440 |
= | 12 | x | − | 5280 |
12 | x | − | 5280 | = | 17 | ( | x | − | 200 | ) |
方程右边 = | 17 | x | − | 17 | × | 200 |
= | 17 | x | − | 3400 |
12 | x | − | 5280 | = | 17 | x | − | 3400 |
12 | x | − | 17 | x | = | - | 3400 | + | 5280 |
- | 5 | x | = | - | 3400 | + | 5280 |
- | 5 | x | = | 1880 |
- | 1880 | = | 5 | x |
5 | x | = | - | 1880 |
x | = | - | 1880 | ÷ | 5 |
= | - | 1880 | × | 1 5 |
= | - | 376 | × | 1 |
x | = | - | 376 |