Question

A total of

Answer 1

Using x as the number of adult tickets sold
If 3x as many student tickets were sold as adults 
--> the number of student tickets is 3x

If the total tickets is 572 and made up of 3x and x

This equation represents the relation ship
Total = 572
number of adult tickets + number of student tickets = 572
x + 3x = 572

When solving for x, we will find the number of adult tickets
x+3x =572
4x=572
x= 572/4
x= 143

143 adult tickets were sold