Question
There are 50 stickers in Box A and 30 stickers in Box B.
Some stickers are transferred from Box A to Box B.
Box B has 30 more stickers than Box A.
How many stickers are transferred from Box A to Box B?
4 m

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There are 50 stickers in Box A and 30 stickers in Box B.
Some stickers are transferred from Box A to Box B.
Box B has 30 more stickers than Box A.
How many stickers are transferred from Box A to Box B?