Question 18161
Let the number of stubent tickets = x
so number of adult tickets = 125-x

cost of student ticket = 2.5 
cost of student tickets = (2.5)x

cost of adult ticket = 4
cost of adult ticket = 4(125-x)

total cost of tickets = (2.5)x + 4(125-x) = 413

(2.5)x + 4(125-x) = 413
(2.5)x + 500 - 4x = 413
 500 - 413 = 4x - (2.5)x
 87 = (1.5)x
 87/1.5 = x
x = 58

number of student tickets  = 58
number of adult tickets  = 125 - 58 = 67

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