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7 March, 21:38

Welp! Tysm!

Each marble bag sold by Justin's Marble Company contains 4 purple marbles for every 5 red marbles. If a bag has 20 purple marbles, how many red marbles does it contain?

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  1. 8 March, 01:06
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    4:5 = 20:x

    Since 20/4 is 5, we know the ratio was multiplied by 5 so the bag contains 25 red marbles.
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