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20 March, 05:33

You sell tickets for admission for your school play and collect $104. Admission is $6 for adults and $4 for children. You sold 21 tickets. How many adult tickets and children tickets did you sell?

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  1. 20 March, 06:56
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    A + c = 21 ... a = 21 - c

    6a + 4c = 104

    6 (21 - c) + 4c = 104

    126 - 6c + 4c = 104

    -6c + 4c = 104 - 126

    -2c = - 22

    c = - 22/-2

    c = 11 < = = = u sold 11 children's tickets

    a + c = 21

    a + 11 = 21

    a = 21 - 11

    a = 10 < = = = u sold 10 adult tickets
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