题目内容
已知
=
，则
=______．
| x |
| y |
| 2 |
| 3 |
| 2x-y |
| x+2y |
由题意，
=
，设x=2m，则y=3m；
∴
=
=
=
．
| x |
| y |
| 2 |
| 3 |
∴
| 2x-y |
| x+2y |
| 2×2m-3m |
| 2m+2×3m |
| m |
| 8m |
| 1 |
| 8 |
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题目内容
| x |
| y |
| 2 |
| 3 |
| 2x-y |
| x+2y |
| x |
| y |
| 2 |
| 3 |
| 2x-y |
| x+2y |
| 2×2m-3m |
| 2m+2×3m |
| m |
| 8m |
| 1 |
| 8 |