Re^2: Meaning Of error in perl

Lets assume x = y
That means 2x = 2y
That means 2*(x-y) = 1*(x-y)

How did you go from line 2 to line 3, for ...

x = y
or, 2x = 2y
or, 2x - 2y = 2y - 2y
or, x - y = 0
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... which was the origin with the assumption of x = y of course?

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Re^3: Meaning Of error in perl by gurpreetsingh13 (Scribe) on Jul 08, 2014 at 08:36 UTC
x = y 2x-x = 2y-y 2x-2y = x-y 2(x-y) = 1(x-y)	[reply]
Re^4: Meaning Of error in perl by Anonymous Monk on Jul 08, 2014 at 09:46 UTC
Ah, now I remember where I saw something similar long time ago: False Proofs, Classic Fallacies, http://mathforum.org/dr.math/faq/faq.false.proof.html (got "permission denied" error when trying to post the URL as a link).	[reply]