а)4а-5а+(3б-б)=-1а+2б
а)(4а-b)-5a+3b=4a-b-5a+3b=-a+2b
б)-(3х-0.4x-3)=3x+0.4x+3=3.4x+3
в)9-2(x+1)+x=9-2x-2+x=7-x
а)4а-5а+(3б-б)=-1а+2б
а)(4а-b)-5a+3b=4a-b-5a+3b=-a+2b
б)-(3х-0.4x-3)=3x+0.4x+3=3.4x+3
в)9-2(x+1)+x=9-2x-2+x=7-x