Question 12713
Let number of student tickets be "x".
Then number of adult tickets is 2x.
Value of student tickets is (2)x dollars
Value of adult tickets is (3)3x = 6x dollars
EQUATION:
Value of student + Value of adult is 824 dollars
      2x + 6x = 824
           8x = 824
            x = 103 (number of student tickets)
           2x = 206 (number of adult tickets)

Cheers,
Stan H.