Answer:
C is the answer
Step-by-step explanation:
12(x + 1) = 7(x + 8)
12x + 12 = 7x + 56
let's notice, this is a Cube, namely all equal sides, and mind you it has 6 sides, Check the picture below.
x = 180
since straight lines are 180
(is it asking to find the area?)