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February 28th, 2014, 03:27 PM   #1
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First proof! - The difference of two numbers is scalable

I was bored today in math class so I decided to try to make a proof. This is a proof showing that the difference between any two numbers is proportional to their size.

Assume x - y = z
Knowing that ax - ay = a(x - y) then if ax - ay = bz, where b is an unknown, then:
bz = a(x - y)
bz = az
b = a

Mainly I'm wondering if I did any sort of logicy thing wrong, so that I can make sure I know how to do it right next time.
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February 28th, 2014, 03:55 PM   #2
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Re: First proof! - The difference of two numbers is scalable

Looks good to me.
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