document.write( "Question 1113669: One pipe can fill a tank in 5 hours less than another. Together they can fill the tank in 5 hours. How long would it take each alone to fill the tank? Compute the answer to two decimal places. \n" ); document.write( "
Algebra.Com's Answer #728751 by josgarithmetic(39618)\"\" \"About 
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\"FastPipe%2BSlowPipe=BothPipesTogether\"\r
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\n" ); document.write( "\n" ); document.write( "\"1%2Fx%2B1%2F%28x%2B5%29=1%2F5\"\r
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\n" ); document.write( "\n" ); document.write( "LCD \"5x%28x%2B5%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"5%28x%2B5%29%2B5x=x%28x%2B5%29\"\r
\n" ); document.write( "\n" ); document.write( "\"5x%2B25%2B5x=x%5E2%2B5x\"\r
\n" ); document.write( "\n" ); document.write( "\"5x%2B25=x%5E2\"\r
\n" ); document.write( "\n" ); document.write( "\"x%5E2-5x-25=0\"\r
\n" ); document.write( "\n" ); document.write( "\"x=%285%2B-+sqrt%2825-4%28-25%29%29%29%2F2\"\r
\n" ); document.write( "\n" ); document.write( "\"x=%285%2B-+sqrt%28125%29%29%2F2\"\r
\n" ); document.write( "\n" ); document.write( "\"x=%285%2B5%2Asqrt%285%29%29%2F2\"\r
\n" ); document.write( "\n" ); document.write( "\"x=8.090\"\r
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\n" ); document.write( "\n" ); document.write( "Ignoring the small fraction part of x,
\n" ); document.write( "The fast pipe would take 8 hours and the slow pipe would take 13 hours.
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