What is the length and the width if the length is 7 inches longer than the width and the perimeter is 38 inches?

Question

Can you please explain how to do it or set it up?

Answer 1

Let x = the width

Let x + 7 = the length

P = 2l + 2w

38 = 2(x + 7) + 2x

38 = 2x + 14 + 2x

24 = 4x

6 inches = x

x + 7 = 13 inches