Amy and Kali are selling cookie dough for a school fundraiser. Customers can buy packages of white
chocoloate chip cookie dough and packages of gingerbread cookie dough. Amy sold 12 packages of
white chocoloate chip cookie dough and 6 packages of gingerbread cookie dough for a total of $246. Kali sold 7 packages of white chocoloate chip cookie dough and 2 packages of gingerbread cookie
dough for a total of $118. What is the cost each of one package of white chocoloate chip cookie dough
and one package of gingerbread cookie dough?
Looks like you have to solve these two equations:
12c + 6g = 246
7c + 2g = 118
I suggest dividing the first equation by 3, then subtracting the equations.