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9 November, 23:00

At the movie theatre, child admission is $5.10 and adult admission is $9.00. On Monday, 163 tickets were sold for a total sales of $1088.70. How many adult tickets were sold that day?

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  1. 9 November, 23:01
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    a = adult tickets

    c = child

    c + a = 163 tickets total

    rewrite as c = 163-a

    5.10c + 9.00a = 1088.70

    5.10 (163-a) + 9.00a = 1088.70

    831.30-5.10a + 9.00a = 1088.70

    831.30 + 3.9a = 1088.70

    3.9a = 1088.70-831.30

    3.9a = 257.40

    a = 257.40 / 3.9 = 66

    66 adult tickets were sold
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