Finding the Width of a Rectangular Garden

Kayla wants to create a rectangular garden with a length that is twice its width. If she wants the perimeter of the garden to be 48 feet, we can represent the width with the variable w.

Which equation can be used to find the width of the garden?

Recall that the perimeter P of a rectangle is given by the formula:

$$P = 2(l + w)$$

where l is the length and w is the width.