-4a+9a+5b-3B=
6X-7-(4X+5)=
(2A)×(3A)=
(-6x)÷(-2X)=
(15A-4A)×2A=
7x-6-2(3x-1)=
收錄日期: 2021-04-13 14:02:21
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070726000051KK03378