Answer:
I don't know what you mean with a b c d and e, but x=7
Step-by-step explanation:
x=7 because first you subtract 6 from each side, because you wan't to have just x, so you will get 3x=21, and then you just divide both sides by3 to get x=7
-7•5+3k+3•5+4k
-7•5+3•5+4k+3k
-4+7k
The associative property is grouping
