Tickets to a Broadway show cost $17 for adults and $12 for children the total receipts for 531 tickets at one performance were $8,167 how many adults and how many child tickets were sold?
a = adults revenue = $ 17a
c = children = 531-a revenue = $ 12(531-a) revenues summed = $ 8167
17a + 12(531-a) = 8167 solve for 'a' the # adult tix then child tix= 531-a