Question
Andy had 7 more green pens than gold pens at first. His father then gave him 10 green pens and his brothers gave him 81 gold pens for Christmas. Andy realised that he now had thrice as many gold pens as green pens. How many pens did Andy have in the end?
4 m

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Andy had 7 more green pens than gold pens at first. His father then gave him 10 green pens and his brothers gave him 81 gold pens for Christmas. Andy realised that he now had thrice as many gold pens as green pens. How many pens did Andy have in the end?