( | 480 | ÷ | 2 | ) | − | ( | 600 | ÷ | 2 | × | x | ) | = | 45 |
方程左边 = | 480 | ÷ | 2 | − | ( | 600 | ÷ | 2 | × | x | ) |
= | 240 | − | ( | 600 | ÷ | 2 | × | x | ) |
= | 240 | − | 600 | ÷ | 2 | × | x |
= | 240 | − | 300 | x |
240 | − | 300 | x | = | 45 |
- | 300 | x | = | 45 | − | 240 |
- | 300 | x | = | - | 195 |
195 | = | 300 | x |
300 | x | = | 195 |
x | = | 195 | ÷ | 300 |
= | 195 | × | 1 300 |
= | 13 | × | 1 20 |
x | = | 13 20 |
x | = | 0.65 |