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posted by Sab on Tuesday, August 28, 2012 at 11:19am.
Rearrange (r+s)/8s=(r-s)/8n to make r the subject. OK, I have started by rearranging the formula: 8n(r+s)=8s(r-s) 8nr+8ns=8sr-8s^2 What do I do next?
all been clarified, thanks
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