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#1 2014-03-26 02:42:23

khazaymeh
Member
Registered: 2014-03-26
Posts: 1

bulding a formula from three assumptions

Hi, I am beginner in mathematics , I have the following three relationships:
a=b
c=d
a-b=c-d

I need to calculate c under the assumption that a, b and d are known values.
I got c=a-b+d
and c=a/b*d

can I use any other formulas?!!

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#2 2014-03-26 02:50:04

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 87,164

Re: bulding a formula from three assumptions

Hi;

c=a/b*d is not true.

Unless you mean

That is generally not true but given your conditions...


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

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