Answer:
76 adult tickets.
Explanation:
There were a total of 304 tickets sold at a school play.
The tickets were either adult or student tickets.
Let the number of adult tickets sold be x.
The number of student tickets were 3x.
So x + 3x = 304
4x = 304
Dividing through by 4 gives;
x = 304 รท 4 = 76
So there were 76 adult tickets sold.