9. The L.U. Student Union brought in David Wilcox to do a concert. Student tickets cost \( \$ 10 \) and Non-student tickets cost \( \$ 18 \) . If \( 1500 \) tickets were sold for a grand total of \( \$ 19400 \) , how many students attended the show? YOU MUST USE A LINEAR SYSTEM APPROACH TO SOLVE.
950 students attended the show