The width of a rectangle is 3 feet less than its length. If the perimeter is 18 feet, what is the width?

width = 3 feet

Step-by-step explanation:

The width of a rectangle is 3 feet less than its length.

Let L be the length of the rectangle

Width is 3 feet less than its length

so width is length - 3

Width = L - 3

given perimeter = 18 feet

Perimeter of rectangle = 2 (length) + 2 (width)

18 = 2L + 2 (L-3)

18 = 2 L + 2L - 6

Add 6 on both sides

24 = 4L

divide by 4 on both sides

L = 6

Length = 6 feet

Width = L - 3 = 6 - 3 = 3 feet