Question
Sarah and Roshel had an equal number of buttons at first. After Sarah gave 11 buttons to Roshel, Roshel had 29 buttons. How many buttons does Sarah have in the end?
4 m

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Sarah and Roshel had an equal number of buttons at first. After Sarah gave 11 buttons to Roshel, Roshel had 29 buttons. How many buttons does Sarah have in the end?