Question
Yen had 135 more chocolate bars than Gwen. Yen used 45 of her chocolate bars and Gwen used 45 of her chocolate bars. In the end, Yen had 4 times as much as Gwen. Find the number of chocolate bars that Gwen had at first.
4 m

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Yen had 135 more chocolate bars than Gwen. Yen used 45 of her chocolate bars and Gwen used 45 of her chocolate bars. In the end, Yen had 4 times as much as Gwen. Find the number of chocolate bars that Gwen had at first.