( | ( | 1 500 | − | X | ) | × | 1200 | × | 10 | ) | ÷ | 1 100 | = | ( | ( | 3 1000 | − | X | ) | × | 800 | × | 10 | ) | ÷ | 1 50 |
方程左边 = | ( | 1 500 | − | X | ) | × | 1200 | × | 10 | × | 100 |
= | ( | 1 500 | − | X | ) | × | 1200000 |
= | 1 500 | × | 1200000 | − | X | × | 1200000 |
= | 2400 | − | X | × | 1200000 |
2400 | − | 1200000 | X | = | ( | ( | 3 1000 | − | X | ) | × | 800 | × | 10 | ) | ÷ | 1 50 |
方程右边 = | ( | 3 1000 | − | X | ) | × | 800 | × | 10 | × | 50 |
= | ( | 3 1000 | − | X | ) | × | 400000 |
= | 3 1000 | × | 400000 | − | X | × | 400000 |
= | 1200 | − | X | × | 400000 |
2400 | − | 1200000 | X | = | 1200 | − | 400000 | X |
- | 1200000 | X | + | 400000 | X | = | 1200 | − | 2400 |
- | 800000 | X | = | 1200 | − | 2400 |
- | 800000 | X | = | - | 1200 |
1200 | = | 800000 | X |
800000 | X | = | 1200 |
X | = | 1200 | ÷ | 800000 |
= | 1200 | × | 1 800000 |
= | 3 | × | 1 2000 |
X | = | 3 2000 |
X | = | 0.0015 |