A total of 520 tickets were sold for the school play. They were either adult tickets or student tickets. The number of student tickets sold was three times the number of adult tickets sold. How many adult tickets were sold?

There were sold 130 adult tickets.

Explanation:

In order to solve the present question, an equation must be posed. Thus, 520 tickets were sold, both adult and student, and the number of student tickets sold was 3 times greater than the number of adult tickets sold. Thus, the proposed equation is the following:

X (adult tickets sold) + 3X (student tickets sold) = 520

X + 3X = 520

4X = 520

X = 520/4

X = 130

Therefore, 130 adult tickets and 390 (130 x 3) student tickets were sold.

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Explanation: