Can you solve it?

[Agent P.A.I.N]

(05-19-2014 05:43 PM)snehamoy Wrote:  its a simple mathematics

A = B
A+A = A+B
2A = A+B
2A-2B = A+B-2B
2(A-B) = A+B-2B
2(A-B) = A-B
2 = 1

How come it became A+A = A+B?