题目内容
已知
=
,则
=______.
| x-y |
| 2x+y |
| 7 |
| 9 |
| y |
| x |
∵
=
,
∴9(x-y)=7(2x+y),
9x-9y=14x+7y,
∴5x=-16y,
∴
=-
.
故答案为:-
.
| x-y |
| 2x+y |
| 7 |
| 9 |
∴9(x-y)=7(2x+y),
9x-9y=14x+7y,
∴5x=-16y,
∴
| y |
| x |
| 5 |
| 16 |
故答案为:-
| 5 |
| 16 |
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