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This guy just uses simple algebra to prove 4=5 and I can't find the trickery
http://www.youtube.com/watch?v=iKTCTy4UsUg&feature=related
http://www.youtube.com/watch?v=iKTCTy4UsUg&feature=related
A shorter way of saying that is that you can't divide both sides of an equation by zero.I see.
So the lesson learned here is that when deviding both sides of an equation by anything the resulting equation is only valid where that thing ≠0
Thanks.