а)6−3(a−2)=6−3a−6=-3а
б)m−3(2−m)=m−6+3m=m−6+3m=4m−6
в)3(x-y)-(x+y)=3x−3y−x−y=3x−3y−x−y=2x−4y
г)4a-2(-b-7)+3(c-1)=4a+2b+14+3c−3=4a+2b+14+3c−3=
44a-2(-b-7)+3(c-1)a+2b+11+3c=4a+2b+11+3c=
4a+2b+3c+11
а)6−3(a−2)=6−3a−6=-3а
б)m−3(2−m)=m−6+3m=m−6+3m=4m−6
в)3(x-y)-(x+y)=3x−3y−x−y=3x−3y−x−y=2x−4y
г)4a-2(-b-7)+3(c-1)=4a+2b+14+3c−3=4a+2b+14+3c−3=
44a-2(-b-7)+3(c-1)a+2b+11+3c=4a+2b+11+3c=
4a+2b+3c+11