A rectangular picture frame is made from one-inch-wide pieces of wood. The area of just the frame is 18 square inches, and one of the outer edges of the frame is inches long. What is the sum of the lengths of the four interior edges of the frame?
I made a frame with two pieces of slat 5" long and two pieces 4" long
The inside perimeter is 14" around (4+4+3+3)
