Liza and Ava are selling cookie dough for a school fundraiser.
Liza sold 8 packages of chocolate chip cookie dough and 12
packages of gingerbread cookie dough for a total of $364. Ava
sold 3 packages of chocolate chip cookie dough and 12
packages of gingerbread cookie dough for a total of $279.
Use elimination to solve the system of linear equations and
determine the cost of one package of chocolate chip cookie
dough, x, and the cost of one package of gingerbread cookie
dough, y. Write your answer as an ordered pair (x, y).