Question

3
John sold 750 tickets to a concert for $6,300. If the price of a student ticket was
$8 and the price of an adult ticket was $10, how many adult tickets did John sell?
6

Answer 1

s and a are the number of student and adult tickets, respectively.
s+a = 750
s = 750-a

8s + 10a = 6300
8(750-a) + 10a = 6300
6000-8a + 10a = 6300
2a = 300
a = 150