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7 December, 10:28

A small fair charges an admission fee for children and adults. The cost for admission is $3 per adult and $2 per child. On a certain day, total sales were $900, and 350 people attended the fair. How many children attended the fair that day?

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  1. 7 December, 10:49
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    3a + 2c = 900

    a + c = 350 ... a = 350 - c

    3 (350 - c) + 2c = 900

    1050 - 3c + 2c = 900

    -3c + 2c = 900 - 1050

    -c = - 150

    c = 150

    so 150 children attended
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