4x-(x-6)=

问题描述:

4x-(x-6)=
7(a-b)-(-4a=3b)

4x-(x-6)
=4x-x+6
=3x+6
7(a-b)-(-4a+3b)
=7a-7b+4a-3b
=11a-10b

不懂可追问,有帮助请采纳,谢谢!