Question
Adam has 400 red stickers and blue stickers.
55% of them are red stickers and the rest are blue stickers.
When Adam buys more red stickers,
90% of the stickers are red stickers.
How many stickers does Adam buy?
4 m

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Adam has 400 red stickers and blue stickers.
55% of them are red stickers and the rest are blue stickers.
When Adam buys more red stickers,
90% of the stickers are red stickers.
How many stickers does Adam buy?