You already have the answer in the question
The difference is the result of a subtraction problem.
We are given two values that are being subtracted: 54 and a number, represented by
So, represent this mathematically with .
Since cube has all sides equal and therefor al sides equal aera and 6 sides
SA=6s^2
96=6s^2
divide both sides by 6
16=s^2
sqrt both sides
4=s=y
4 is answer