( | x | − | 180 | ) | × | 3 4 | ÷ | 2400 | = | ( | x | − | 450 | ) | × | 3 4 | ÷ | 2000 |
方程左边 = | ( | x | − | 180 | ) | × | 1 3200 |
( | x | − | 180 | ) | × | 1 3200 | = | ( | x | − | 450 | ) | × | 3 4 | ÷ | 2000 |
方程左边 = | x | × | 1 3200 | − | 180 | × | 1 3200 |
= | x | × | 1 3200 | − | 9 160 |
1 3200 | x | − | 9 160 | = | ( | x | − | 450 | ) | × | 3 4 | ÷ | 2000 |
方程右边 = | ( | x | − | 450 | ) | × | 3 8000 |
1 3200 | x | − | 9 160 | = | ( | x | − | 450 | ) | × | 3 8000 |
方程右边 = | x | × | 3 8000 | − | 450 | × | 3 8000 |
= | x | × | 3 8000 | − | 27 160 |
1 3200 | x | − | 9 160 | = | 3 8000 | x | − | 27 160 |
1 3200 | x | − | 3 8000 | x | = | - | 27 160 | + | 9 160 |
- | 1 16000 | x | = | - | 27 160 | + | 9 160 |
- | 1 16000 | x | = | - | 9 80 |
9 80 | = | 1 16000 | x |
1 16000 | x | = | 9 80 |
x | = | 9 80 | ÷ | 1 16000 |
= | 9 80 | × | 16000 |
= | 9 | × | 200 |
x | = | 1800 |