Question
Harry strings some yellow and black smoothed stones to make a necklace. For every 3 yellow smoothed stones Harry uses, he uses 8 black smoothed stones. He uses a total of 77 yellow and black smoothed stones for the necklace. How many more black smoothed stones than yellow smoothed stones does he use?
4 m

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Harry strings some yellow and black smoothed stones to make a necklace. For every 3 yellow smoothed stones Harry uses, he uses 8 black smoothed stones. He uses a total of 77 yellow and black smoothed stones for the necklace. How many more black smoothed stones than yellow smoothed stones does he use?