document.write( "Question 1172530: Theresa can do a piece of work in 15 days. After she has worked 3 days, Rowena joins her and they finish work in 4 days. How long can Rowena finish the work alone? \n" ); document.write( "
Algebra.Com's Answer #797601 by josgarithmetic(39617)\"\" \"About 
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Therasa's rate, \"1%2F15\".
\n" ); document.write( "Rowena's rate, \"1%2Fw\".
\n" ); document.write( "Combined rate of both, \"1%2F15%2B1%2Fw\".\r
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\n" ); document.write( "\n" ); document.write( "Question based on 1 job.\r
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\n" ); document.write( "\n" ); document.write( "\"%281%2F15%293%2B%281%2F15%2B1%2Fw%29%2A4=1\"\r
\n" ); document.write( "\n" ); document.write( "\"3%2F15%2B4%2F15%2B4%2Fw=1\"\r
\n" ); document.write( "\n" ); document.write( "\"7%2F15%2B4%2Fw=1\"\r
\n" ); document.write( "\n" ); document.write( "\"7w%2B15%2A4=15w\"\r
\n" ); document.write( "\n" ); document.write( "\"60=15w-7w\"\r
\n" ); document.write( "\n" ); document.write( "\"60=8w\"-----------\"15=2w\"\r
\n" ); document.write( "\n" ); document.write( "\"highlight%28w=7%261%2F2%29\"
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