Answer :
Answer:
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.