Question

A square has a perimeter of 12x + 52 units. Which expression represents the side length of the square in units?

Answer 1

The perimeter of a square is the sum of its sides.
 Then the perimeter is
 P = 4L
 Clearing the side we have:
 L = (P / 4)
 L = (12x + 52) / 4
 L = 3x + 13
 answer:
 The side length of the square is 3x + 13 units

Answer 2

Perimeter = (side length)(4)
12x + 52 = s4
(12x + 52)/4 = s
3x+13=s