Algebra Level 2

There are two sets of birds on different branches: say group A and group B.

One of the group A says if one of you ( group B ) will come to us, then we will be twice number of you, then one of the group B says: no, no, if one of you ( group A ) will come to us , then we will be equal to you.

Find the number of birds in A and number of birds in B

type your answer like this:
xy ( without any space, without any comma )
( x represents number of A birds ...y represents number of B birds )


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