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28 December, 14:31

Three times as many robinsas cardinals visited a bird feeder. If a total of 20 robin and cardinals visited the feeder, how many were robins

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  1. 28 December, 15:43
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    X=# of cardinals

    3 times as many robins as cardinals visited the feeder, so # of robins=3x

    robins+cardinals=20, so x+3x=20

    4x=20

    x=5 cardinals

    20-x=15 robins
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