2) -6+(7х-2у)=-6+7х-2у
3) 18+(-6а-4b)=18-6a-4b
4) 7.8+(3m-2n+p)=7.8+3m-2n+p
7) 15-(2a-3b-4c)=15-2a+3b+4c
8) 10-(-3x-4y-z)=10+3x+4y+z
9) -7-(6m+3n)= -7-6m-3n
12)-4*(2x-3y+5)=-8x+12y-20
13) (-6a+2b)*3=-18a+6b
14) 7*(7x+3y-12)=49x+21y-84
15) (2a-17b-3)*(-9)=-18a+153b+27
16)8.5*(-7x-3y)=-59.5x-25.5y
