What is 20- yards loss

Arestaurant offers a $12 dinner special that has 5 choices for an appetizer, 12 choices for an entrée, and 4 choices for a dessert. how many different meals are available when you select an appetizer, an entrée, and a dessert? a meal can be chosen in nothing ways. (type a whole number.)

Find the solution of this system of equation -7x+y=-20 9x-3y=36

X+y=-4 x-y=2 use elimination with adding and subtraction