Question

A rectangle has a perimeter of 144 inches. The width of the rectangle is 12 inches less than the length. What is the width, in inches, of the rectangle?

Answer 1

The width in inches would be 12, because of the formula:

length x width = perimeter

so you would do it reverse!

perimeter/length = width

so, 144/12 = 12

Answer 2

1. 2W + 2L = 144 ___ dividing by 2 ___ W + L = 72

___ W = L - 12

___ substituting ___ (L - 12) + L = 72 ___ 2L = 84 ___ L = 42