# 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?

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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?

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Step 1

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).

Step 2

Substitute the equation (1) in (2) to...

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MathAlgebra