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21 April, 22:40

You and your friend are selling tickets to a charity event. You sell 4 adult tickets and 11 student tickets for $148. Your friend sells 7 adult tickets and 5 student tickets for $145. What is the cost of a student ticket?

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  1. 21 April, 23:01
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    4x + 11y = 148

    7x + 5y = 145

    multiply first equation by 7 and second by - 4:-

    28x + 77y = 1036

    -28x - 20y = - 580 Adding:-

    0 + 57y = 456

    y = 456 / 57 = 8

    Cost of a student ticket = $8 Answer
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