Answer is <span>A.x=4
</span><span>5x−5=15
5(4) - 5 = 15
20 - 5 = 15
15 = 15</span>
I don't understand the question either. The only answer I can think of is possible that the volume would be entered in the unit cubed. By that I mean: 4 in.^3 while surface area I think would just be in.^2 (squared). I'm not 100% sure that is what they are asking but if it is this should be the answer. Hope it helps.
The answer is A: because 3x • 4x = 12x^2; 3x • 3 and -2 • 4x make 9x-8x which is just x; and -2 • 3 is -6