1)a+(a-2b-c)=

问题描述:

1)a+(a-2b-c)=
2)a-(b+c-d)=
3)-3(2a+4b)
4)4(3x-5y)=
5)m-2(p-q)=
去括号

(1)=2a-2b-c
(2)=a-b-c+d
(3)=-6a-12b
(4)=12x-20y
(5)=m-2p+2q