a family purchased tickets for a concert. they paid a total of $90 for 7 adult tickets and 12 child tickets. the price of a child ticket was two-thirds the price of an adult ticket . How much was the price of an adult ticket
Let price of adult tickets be X and that of Child tickets be Y. 90 = 7X + 12Y Y=2/3 X 90 = 7X + 12(2/3 X) = 15X X=6, and also hence Y = 4 Therefore Price of adult tickets , X = 6
