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22 October, 11:51

An is planning a birthday party for her younger sister at a skating rink. the cost of admission is $3.50 per adult and $2.25 per child., and there is a limit of 20 people. jan has $50 to spend. how many adults and how many children can jan invite?

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  1. 22 October, 12:10
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    let x be the number of adults

    let y be the number of child

    3.5 x + 2.25 y = 50

    x + y = 20 y = 20 - x

    3.5 (20-y) + 2.25 y = 50

    70 - 3.5 y + 2.25y = 50

    70 - 1.25 y = 50

    y = 16

    and x = 4
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