2a-[-3b+4a-(3a-b)

分类: 作业答案 • 2021-12-19 15:53:18

问题描述：

2a-[-3b+4a-(3a-b)

答

=2a-(-3b+4a-3a+b)
=2a-(-2b+a)
=a+2b

答

2a-[-3b+4a-(3a-b)】=2a+3b-4a+(3a-b)=-2a+3b+3a-b=a+2b

答

2a-[-3b+4a-(3a-b)]
=2a+3b-4a+(3a-b)
=-2a+3b+(3a-b)
=-2a+3b+3a-b
=a+2b

答

=2a-(3b+4a-3a+b)
=2a-（a+4b)
=2a-a-4b
=a-4b