1+1 = 2 ??

[Shajahan ES]

by simply considering a=b, i got a+b=b from a simple proof...
so 1+1 = 2 ??
try to solve it..
http://goforaplusplus.wordpress.com/2011/05/29/where-we-went-wrong/

[Shafeeq K]

I thought the prob is in the 4th step.
I've put my solution as comment in the post :

4th step.
a-b is 0 and 0*(any number) is 0. We are actually taking common
factors out of the equation 0 = 0. Does 2 * 0 = 5 * 0 , necessarily
mean 2 = 5 ?
It’s all the 0′s play :)

Wrong? Alternatives?

Shafeeq