Question 333974
NOTE:  The length cannot be x cm because the length of a rectangle is always bigger than the width.

Let x = width

Let x + 2 = length

The perimeter of a rectangleis found using P = 2L + 2W.

P = 2(x + 2) + 2x

P = 2x + 4 + 2x

P = 4x + 4

Done!