-5a+(3a-2)-(3a-7)=?

分类: 作业答案 • 2022-05-16 11:35:40

问题描述：

-5a+(3a-2)-(3a-7)=?

答

-5a+(3a-2)-(3a-7)
=-5a+3a-2-3a+7
=-5a+5

答

吧把括号打开在合并同类项
=-5a+5

答

-5a+（3a-2)-(3a-7)= -5a+3a-2-3a+7=-5a+3a-3a-2+7=-5a+5(或5-5a）

答

-5a+5

答

-5a+(3a-2)-(3a-7)
=-5a+3a-2-3a+7
=-5a+3a-3a-2+7
=-5a+5
=5-5a