Devon purchased one bag of dog food and three bags of cat food. Each bag of dog food weighs x pounds and each bag of cat food weighs half as much as the bag of dog food. The total weight of Devons purchase is 32.5 pounds. The equation x + 3(x/2) = 32.5 can be used to determine the weight of the dog food and cat food. What is the weight of in pounds of one bag of cat food?