Question
Luis had 4 more green stamps than black stamps at first. His uncle then gave him 16 green stamps and his schoolmates gave him 86 black stamps for Christmas. Luis realised that he now had thrice as many black stamps as green stamps. How many stamps did Luis have in the end?
4 m

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Luis had 4 more green stamps than black stamps at first. His uncle then gave him 16 green stamps and his schoolmates gave him 86 black stamps for Christmas. Luis realised that he now had thrice as many black stamps as green stamps. How many stamps did Luis have in the end?