4(7-y)=

(4 x 3k) + (4 x 4)=

6(2 + 4x)=

(5 x a) + (5 x 2)=

4(7-y)= 28 - 4y

(4 x 3k) + (4 x 4)= 12k + 16

I'll be glad to check your answers to the other two problems.