4 Jillian's school is selling tickets for a play. The tickets cost $10.50 for adults and $3.75 for students. The ticket salesfor opening night totaled $2071.50. The equation 10.50a 3.75b 2071.50, where a is the number of adult ticketsA sold and b is the number of student tickets sold, can be used to find the number of adult and student tickets. If 82students attended, how may adult tickets were sold?adult tickets