9514 1404 393
Answer:
250
Explanation:
Let 'a' represent the number of adult tickets sold. Then a-50 is the number of student tickets sold. The total number is ...
a + (a -50) = 450
2a = 500 . . . .simplify, add 50
a = 250 . . . . . divide by 2
250 adult tickets were sold.