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Mathematics 18 Online
OpenStudy (jacky90):

Will medal Each marble bag sold by Lamar's Marble Company contains 4 blue marbles for every 7 yellow marbles. If a bag has 20 blue marbles, how many yellow marbles does it contain?

OpenStudy (anonymous):

the ratio between blue and yellow is constant. blue/yellow = blue/yellow 4/7 = 20/x

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