Square are the same size all the way around, which means every side = x + 4
The perimeter of a square = 4 * side
the perimeter = 44 cm
Let's plug our values into the formula above.
44 cm = 4 * (x + 4)
Distribute the 4
44 cm = 4x + 16
Subtract 16 from both sides
28 cm = 4x
Divide both sides by 4
7 = x