document.write( "Question 186996: S= a/1-r\r
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Algebra.Com's Answer #140153 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
S= a/1-r
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\n" ); document.write( "1-r = a/S\r
\n" ); document.write( "\n" ); document.write( "r = 1 - a/S\r
\n" ); document.write( "\n" ); document.write( "r = (S-a)/S
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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