1)
[tex]-2(x-4y)-(x+y)=\\\\-2x+8y-x-y=\\\\=-2x-x+8y-y=\boxed{-3x+7y}[/tex]
2)
[tex]3(2x-4y)-2(-x-y)=\\\\=6x-12y+2x+2y=\\\\=6x+2x-12y+2y=\boxed{8x-10y}[/tex]
-2(x-4y)-(x+y)=-2x+8y-x-y=-3x+7y
3(2x-4y)-2(-x-y)=6x-12y+2x+2y=8x-10y
