Seventh Grade Singapore Problem

Coolblueocean2001
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Published on May 13, 2014

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Jim had 103 red and blue marbles. After giving 2/5 of his blue marbles and 15 of his red marbles to Samantha, Jim had 3/7 as many red marbles as blue marbles. How many blue marbles did he have originally?
Ans: 70

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