Jillian’s school is selling tickets for a play. The tickets cost $10. 50 for adults and $3. 75 for students. The ticket sales for opening night totaled $2071. 50. The equation 10. 50 a plus 3. 75 b equals 2071. 50, where a is the number of adult tickets sold and b is the number of student tickets sold, can be used to find the number of adult and student tickets. If 82 students attended, how may adult tickets were sold?