B said to A, "You'd better give me a sheep so that we can have as much." It shows that A has more sheep than B 1+ 1=2.

Suppose B has X sheep, then A has X+2 sheep;

2(X- 1)=X+2+ 1

2X-2=X+3

X=5

5+2=7

So A has seven sheep and B has five.