Algebra

There are 60 marbles in a bowl. Their colors are red, blue, and yellow. 1/3 of the marbles are yellow, 1/4 of the marbles are blue. How many red marbles are there in the bowl?

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  1. 60 - 60/3 - 60/4 = ?

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  2. 1/3 + 1/4 =
    4/12 + 3/12 = 7/12 are blue or yellow

    5/12 * 60 = 300/12 = 25 red

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    Ms. Sue

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