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 September 1st, 2012, 06:22 AM #1 Newbie   Joined: Sep 2012 Posts: 16 Thanks: 0 Help solving for variable in terms of other variables Hello, I would like to know how do I solve for 'r' in terms of p,q and s. p = (3s-r)/(rq) , I used "()" because I cannot properly write 3s-r over rq. Thank you
 September 1st, 2012, 07:18 AM #2 Global Moderator     Joined: Oct 2008 From: London, Ontario, Canada - The Forest City Posts: 7,968 Thanks: 1152 Math Focus: Elementary mathematics and beyond Re: Help solving for variable in terms of other variables $p\,=\,\frac{3s - r}{rq} \\ prq\,=\,3s\,-\,r \\ prq\,+\,r\,=\,3s \\ r(pq\,+\,1)\,=\,3s \\ r\,=\,\frac{3s}{pq\,+\,1}$
 September 1st, 2012, 07:23 AM #3 Newbie   Joined: Sep 2012 Posts: 16 Thanks: 0 Re: Help solving for variable in terms of other variables Thank you
 September 1st, 2012, 07:35 AM #4 Global Moderator   Joined: Dec 2006 Posts: 21,027 Thanks: 2258 Note that you can't solve for r if s = 0.

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### what is S in p=3S in variables?

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