aubree and her children went into a movie theatre and she bought $32 worth of bags of popcorn and pretzel. each bag of popcorn costs $8 and each pretzel costs $4. she bought a total of 6 bags of popcorn and pretzels altogether. Graphically solve a system of equations in order to determine the number of bags of popcorn, x, and the number of pretzels,y, that aubree bought.