Perimeter of a cage is 32 feet, the length id 4 less than 3 times width, what are the dimensions for the cage

Question

Deanna built a rectangular cage for her rabbits. The perimeter is 32 feet. The length is four less than three times the width. What are the dimensions of the new cage

Answer 1

Let w=width, then length=3w-4 and the perimeter is 2(3w-4+w)=32, so 4w-4=16, 4w=20 and w=5 so length=3w-4=11.