( | 18000 | − | X | ) | ÷ | X | = | - | 83 200 |
方程两边同时乘以: | X |
( | 18000 | − | X | ) | = | - | 83 200 | X |
18000 | − | X | = | - | 83 200 | X |
- | X | + | 83 200 | X | = | - | 18000 |
- | 117 200 | X | = | - | 18000 |
18000 | = | 117 200 | X |
117 200 | X | = | 18000 |
X | = | 18000 | ÷ | 117 200 |
= | 18000 | × | 200 117 |
= | 2000 | × | 200 13 |
X | = | 400000 13 |
X | = | 30769.230769 |