Do The Math!

I found this tidbit on a t-shirt, and it amused me.

If a and b are > 0	a = b
Multiply both sides by a	a² = ab
Minus b² from both sides	a² - b² = ab - b²
Factoring	(a+b) (a-b) = b (a-b)
Divide both sides by (a-b)	a + b = b
If a = b, then	2b = b
Divide both sides by b	2 = 1