Question
Bobby strings some grey and brown buttons to make a necklace. For every 4 grey buttons Bobby uses, he uses 8 brown buttons. He uses a total of 60 grey and brown buttons for the necklace. How many more brown buttons than grey buttons does he use?
4 m

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Bobby strings some grey and brown buttons to make a necklace. For every 4 grey buttons Bobby uses, he uses 8 brown buttons. He uses a total of 60 grey and brown buttons for the necklace. How many more brown buttons than grey buttons does he use?