Question
Shiyun, Marion and Emily have 132 cards. Shiyun has 56 as many cards as Marion. Emily's cards is 13 of the total number of Shiyun's and Marion's cards. How many cards must Marion give to Emily so that both Shiyun and Emily will have the same number of cards?
4 m

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Shiyun, Marion and Emily have 132 cards. Shiyun has 56 as many cards as Marion. Emily's cards is 13 of the total number of Shiyun's and Marion's cards. How many cards must Marion give to Emily so that both Shiyun and Emily will have the same number of cards?