Question
Linda, Tina and Tiffany have 528 marbles. Linda has 56 as many marbles as Tina. Tiffany's marbles is 15 of the total number of Linda's and Tina's marbles. How many marbles must Tina give to Tiffany so that both Linda and Tiffany will have the same number of marbles?
4 m

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Linda, Tina and Tiffany have 528 marbles. Linda has 56 as many marbles as Tina. Tiffany's marbles is 15 of the total number of Linda's and Tina's marbles. How many marbles must Tina give to Tiffany so that both Linda and Tiffany will have the same number of marbles?