document.write( "Question 777791: One pipe can fill a tank in 5 hours. A second can fill it in 3 hours. How long will it take both pipes together to fill the tank? \n" ); document.write( "
Algebra.Com's Answer #474261 by jim_thompson5910(35256)\"\" \"About 
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\"1%2F5+%2B+1%2F3+=+1%2Ft\"\r
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\n" ); document.write( "\n" ); document.write( "\"3%2F15+%2B+5%2F15+=+1%2Ft\"\r
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\n" ); document.write( "\n" ); document.write( "\"8%2F15+=+1%2Ft\"\r
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\n" ); document.write( "\n" ); document.write( "\"8t+=+15%2A1\"\r
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\n" ); document.write( "\n" ); document.write( "\"8t+=+15\"\r
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\n" ); document.write( "\n" ); document.write( "\"t+=+15%2F8\"\r
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\n" ); document.write( "\n" ); document.write( "Answer: \"15%2F8\" hours (that's equivalent to \"1%267%2F8\" hours or 1.875 hours)
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