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Question

The ratio of the number of Larry’s marbles to the number of John’s marbles was 3:5. In a game with their friends, Larry won 15 marbles while John lost 3 marbles. They both then had the same number of marbles. How many marbles did both boys have altogether before the game?

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Answer

Time——–Larry—-John
Before——–3u——-5u
After——–3u+15—–5u-3

3u+15=5u-3
2u=18
u=9
Before total is 8u..Hence 8×9=72 marbles

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