Question
Tom strings some red and purple buttons to make a bracelet. For every 5 red buttons Tom uses, he uses 7 purple buttons. He uses a total of 84 red and purple buttons for the bracelet. How many more purple buttons than red buttons does he use?
4 m

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Tom strings some red and purple buttons to make a bracelet. For every 5 red buttons Tom uses, he uses 7 purple buttons. He uses a total of 84 red and purple buttons for the bracelet. How many more purple buttons than red buttons does he use?