Linda sold 2 kinds of tickets to her class play. student ticket cost $4 each an adult ticket cost $6.50 each. if Linda sold a total of 21 tickets for $99 how many student tickets did she sell?
Given that, the cost of the student’s ticket is $4 and the cost of the adult ticket is $6.50, and she sold 21 tickets.
Let x be the number of students tickets and let y be the number of adults tickets.
That is, x+y = 21.
x = 21–y (1)
The total cost of the tickets is $99.
That is, 4x+6.5y = 99 (2).
Substitute the equation (1) in (2) to...
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