Question
Sean had 7 more yellow pens than purple pens at first. His aunt then gave him 17 yellow pens and his sisters gave him 144 purple pens for Christmas. Sean realised that he now had four times as many purple pens as yellow pens. How many pens did Sean have in the end?
4 m

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Sean had 7 more yellow pens than purple pens at first. His aunt then gave him 17 yellow pens and his sisters gave him 144 purple pens for Christmas. Sean realised that he now had four times as many purple pens as yellow pens. How many pens did Sean have in the end?