forming a formula from a=b ... c=d

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khazaymeh
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Joined: Wed Mar 26, 2014 2:21 pm
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forming a formula from a=b ... c=d

Postby khazaymeh » Wed Mar 26, 2014 2:33 pm

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?!!

buddy
Posts: 176
Joined: Sun Feb 22, 2009 10:05 pm
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Re: forming a formula from a=b ... c=d

Postby buddy » Wed Mar 26, 2014 3:46 pm

khazaymeh wrote: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

They gave you c=d. Can't you just use d?

BTW: a=b so a-b=0 & c=d so c-d=0. What was the original question??


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