题目内容
若2x+3y=0,则
的值是______.
| x-3y |
| x+3y |
∵2x+3y=0,
∴3y=-2x,
把它代入
,得
=
=-3,
故答案是:-3.
∴3y=-2x,
把它代入
| x-3y |
| x+3y |
| x-3y |
| x+3y |
| x+2x |
| x-2x |
故答案是:-3.
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题目内容
| x-3y |
| x+3y |
| x-3y |
| x+3y |
| x-3y |
| x+3y |
| x+2x |
| x-2x |