Boxes of Balls

There are two boxes, box A and box B.  Each box contains several balls.

If you move one ball from box A to box B, box B will then have twice as many balls as box A.

If you move one box from box B to box A, both boxes will then have the same amount of balls.

How many balls are in each box?

View Answer
Box A has 5 balls and box B has 7 balls.

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