Verified answer

3(x-8)=3x-8×3=3x-24

-5(y-7)=-5y-7×(-5)=-5y+35

-a(-c-7)=ac+7a

-n(2m-5)=-2nm+5n

-4-(m-m)=-4-m+n

(x-y-z)×5=5x-5y-5z

а) 3x-24

b) -5y+35

c) ac+7a

d) -2mn+5n

e) -4(-m+n)=4m-4n

f) 5x-5y-5z