The cost of the Adult tickets is: $10.50
and for students it is: $3.75
Representing with “a” the number of adult tickets sold, and with “b” the number of student tickets sold, we can write the equation for the total amount collected as:
10.5 a + 3.75 b = 2071.50
Therefore, if we know the number of students that attended “b”, we can solve for the number of adults “a” in the equation:
a = (2071.50 – 3.75 b ) / 10.5