题目内容
计算
+
-
得( )
| 3x |
| x-4y |
| x+y |
| 4y-x |
| 7y |
| x-4y |
A.-
| B.
| C.-2 | D.2 |
| 3x |
| x-4y |
| x+y |
| 4y-x |
| 7y |
| x-4y |
| 3x |
| x-4y |
| x+y |
| x-4y |
| 7y |
| x-4y |
| 3x-x-y-7y |
| x-4y |
| 2x-8y |
| x-4y |
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相关题目
计算
+
-
得( )
| 3x |
| x-4y |
| x+y |
| 4y-x |
| 7y |
| x-4y |
A、-
| ||
B、
| ||
| C、-2 | ||
| D、2 |