Question
Xavier gave 211 of his buttons to Perry, 29 of his remaining buttons to Luke and 37 of the rest of his buttons to Charlie. He then had 20 buttons left. How many buttons had he at first?
4 m

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Xavier gave 211 of his buttons to Perry, 29 of his remaining buttons to Luke and 37 of the rest of his buttons to Charlie. He then had 20 buttons left. How many buttons had he at first?