Fill in the blanks for the weigh and number of toys

Question

Marcy works in the shipping department of a toy manufacturer. Toy cars weigh 7 pounds apiece and are shipped in a container that weighs 12 pounds when empty. Toy trucks, which weigh 4 pounds apiece, are shipped in a container weighing 18 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? What is the number of toys?

Answer 1

12+7c= 18+4t

7c-4t=6, c=t

3c=6

c=2 =t

c and t are integers. both = 2 cars 2 trucks, both weigh 26 ibs

7(2) -4(2) = 6

12+7(2) = 26

18+4(2) = 26