题目内容
若5x-7y=0,则
=______;若
=
,那么
=______.
| x |
| y |
| x+y |
| y |
| 7 |
| 3 |
| x |
| y |
由5x-7y=0,即5x=7y,
∴
=
;
若
=
,
∴
=
=
=
.
∴
| x |
| y |
| 7 |
| 5 |
若
| x+y |
| y |
| 7 |
| 3 |
∴
| x |
| y |
| x+y-y |
| y |
| 7-3 |
| 3 |
| 4 |
| 3 |
练习册系列答案
相关题目
题目内容
| x |
| y |
| x+y |
| y |
| 7 |
| 3 |
| x |
| y |
| x |
| y |
| 7 |
| 5 |
| x+y |
| y |
| 7 |
| 3 |
| x |
| y |
| x+y-y |
| y |
| 7-3 |
| 3 |
| 4 |
| 3 |