I need help! My math is confusing

Question

The perimeter of a square is represented by the expression 32x − 12. Write two equivalent expressions for the perimeter and explain how to find the length of one side.  

Answer 1

perimeter of a square = 32x -12 = 4s

P = 32-12

P = 4s

s = a side of the square. 4 times a side = the perimeter

4s = 32x-12

s = 8x -3 = length of the square's side