SOLUTION: S= a/1-r solve for r

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Question 186996: S= a/1-r
solve for r
Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website!
S= a/1-r
solve for r
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1-r = a/S
r = 1 - a/S
r = (S-a)/S
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Cheers,
Stan H.