Question
Adam has 390 blue stickers and red stickers.
30% of them are blue stickers and the rest are red stickers.
When Adam buys more blue stickers,
80% of the stickers are blue stickers.
How many stickers does Adam buy?
4 m

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Adam has 390 blue stickers and red stickers.
30% of them are blue stickers and the rest are red stickers.
When Adam buys more blue stickers,
80% of the stickers are blue stickers.
How many stickers does Adam buy?