68 | × | 100 | ÷ | X | ÷ | 21 20 | ÷ | 90 | × | 100 | = | 121 |
方程两边同时乘以: | X |
68 | × | 100 | ÷ | 21 20 | ÷ | 90 | × | 100 | = | 121 | X |
- | 121 | X | = | - | 68 | × | 100 | ÷ | 21 20 | ÷ | 90 | × | 100 |
- | 121 | X | = | - | 1360000 189 |
1360000 189 | = | 121 | X |
121 | X | = | 1360000 189 |
X | = | 1360000 189 | ÷ | 121 |
= | 1360000 189 | × | 1 121 |
X | = | 1360000 22869 |
X | = | 59.46915 |