The cost of 3 pizzas and 4 sandwiches at Ralph's Deli is $68. The cost of 3 pizzas and 7 sandwiches is $92. What is the cost of one pizza and one sandwich?

Respuesta :

Pizza is 12. Sandwich is 8. Total for both is 20.
92-68=24
24/3=8
 8*4=32
68-32=36
 36/3=12