A school sold 300 tickets to a basketball game. Tickets were $9 foradults and $5 for children. If the total revenue was $2340, how many of each type of ticket were sold?
Children's tickets = C
Adult tickets =300 - C
5C + 9*(300 - C) =2340, solve for C
C =90 Children's tickets sold
300 - 90 = 210 Adult tickets sold.