Grayson and his children went into a movie theater where they sell bags of popcorn for $7.50 each and candies for $5 each. Grayson has $70 to spend and must buy a minimum of 10 bags of popcorn and candies altogether. If x represents the number of bags of popcorn purchased and y represents the number of candies purchased, write and solve a system of inequalities graphically and determine one possible solution.