85 | x | + | 90 | ( | 25 | − | x | ) | = | 25 | × | 2202 25 |
方程左边 = | 85 | x | + | 90 | × | 25 | − | 90 | x |
= | 85 | x | + | 2250 | − | 90 | x |
= | - | 5 | x | + | 2250 |
- | 5 | x | + | 2250 | = | 25 | × | 2202 25 |
方程右边 = | 2202 |
- | 5 | x | + | 2250 | = | 2202 |
- | 5 | x | = | 2202 | − | 2250 |
- | 5 | x | = | - | 48 |
48 | = | 5 | x |
5 | x | = | 48 |
x | = | 48 | ÷ | 5 |
= | 48 | × | 1 5 |
x | = | 48 5 |
x | = | 9.6 |