Выражение а) 6-3(a+2) b) m-3(2-m) c) 3(x-y)-(x+y) d) 4a-2(-b-7)+3(c-1)

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