Question
Lucas and Riordan had 216 buttons altogether. After Lucas gave 19 buttons to Riordan, Lucas had 2 times as many buttons as Riordan. How many buttons did Riordan have at first?
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Lucas and Riordan had 216 buttons altogether. After Lucas gave 19 buttons to Riordan, Lucas had 2 times as many buttons as Riordan. How many buttons did Riordan have at first?