Question
Yen had some chocolate bars. She sold 10% of her chocolate bars and gave half of the remainder to her brother. After that, she bought 33 chocolate bars and had a total of 123 chocolate bars in the end. How many chocolate bars did Yen have at first?
4 m

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Yen had some chocolate bars. She sold 10% of her chocolate bars and gave half of the remainder to her brother. After that, she bought 33 chocolate bars and had a total of 123 chocolate bars in the end. How many chocolate bars did Yen have at first?