Question 841339
<pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi
Excellent on:
x= adult tickets
500-x= student tickets
Instructor is calling for 'two' variables:
x= adult tickets
y = student tickets = 500-x     :)
Question states***The total income was $1362.50
 5x + 2.50y = 1362.50
 5x + 2.50(500-x) = 1362.50   |Substitute for 'y'
 5x + 1250 -2.50x = 1362.50   
     2.50x = 112.50
         x = 45, number of Adult tickets.  455 student tickets
CHECKING our answer***
  $225 + $1137.50 = $1362.50
Wish You the Best in your Studies.