Peter works in the shipping department of a toy manufacturer. Toy cars weigh 10 pounds apiece and are shipped in a container tha
t weighs 10 pounds when empty. Toy trucks, which weigh 8 pounds apiece, are shipped in a container weighing 20 pounds. When packed with toys and ready for shipment, both kinds of containers have the same number of toys and the same weight. What is the weight of each container?
