Question
Carl had 9 more grey buttons than red buttons at first. His father then gave him 20 grey buttons and his classmates gave him 173 red buttons for Christmas. Carl realised that he now had four times as many red buttons as grey buttons. How many buttons did Carl have in the end?
4 m

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Carl had 9 more grey buttons than red buttons at first. His father then gave him 20 grey buttons and his classmates gave him 173 red buttons for Christmas. Carl realised that he now had four times as many red buttons as grey buttons. How many buttons did Carl have in the end?