At the performance of Seussical the Musical at your local high school, there are adult tickets and student/child tickets. You're trying to remember the cost of each to tell your extended family to come see the musical. Your friend,
her mom and her little sister paid a total of $23 on opening night, and you know that another family paid $39 for
two adults and three students. If x is cost of adult tickets and y is cost of student tickets, the two equations for these
situations can be written as: