Question
Ivan had 9 more purple stamps than yellow stamps at first. His father then gave him 20 purple stamps and his brothers gave him 167 yellow stamps for Christmas. Ivan realised that he now had four times as many yellow stamps as purple stamps. How many stamps did Ivan have in the end?
4 m

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Ivan had 9 more purple stamps than yellow stamps at first. His father then gave him 20 purple stamps and his brothers gave him 167 yellow stamps for Christmas. Ivan realised that he now had four times as many yellow stamps as purple stamps. How many stamps did Ivan have in the end?