document.write( "Question 485699: Pn = r + si/f\r
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Algebra.Com's Answer #332140 by solver91311(24713)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "\n" ); document.write( "Add -r to both sides.\r
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\n" ); document.write( "\n" ); document.write( "Take the reciprocal of both sides.\r
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\n" ); document.write( "My calculator said it, I believe it, that settles it
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\"The

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