document.write( "Question 232546: Pipe A can fill a tank in 5 hours. Pipe B can fill the tank in 2 hours less time than it takes pipe C to empty it. With all pipes open it takes 3 hours to fill the tank. How long will it take pipe C to empty the tank? \n" ); document.write( "
Algebra.Com's Answer #171819 by stanbon(75887)\"\" \"About 
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Pipe A can fill a tank in 5 hours. Pipe B can fill the tank in 2 hours less time than it takes pipe C to empty it. With all pipes open it takes 3 hours to fill the tank. How long will it take pipe C to empty the tank?
\n" ); document.write( "------
\n" ); document.write( "Pipe A DATA:
\n" ); document.write( "filling rate = 1/5 tank/hr
\n" ); document.write( "-------------------
\n" ); document.write( "Pipe C DATA:
\n" ); document.write( "filling rate = 1/x tank/hr
\n" ); document.write( "-----------------------
\n" ); document.write( "Pipe B DATA:
\n" ); document.write( "filling rate = 1/(x-2) tank/hr
\n" ); document.write( "------------------------
\n" ); document.write( "Together DATA:
\n" ); document.write( "filling rate = 1/3 tank/hr
\n" ); document.write( "------------------------------------
\n" ); document.write( "Equation:
\n" ); document.write( "rate + rate + rate = together rate
\n" ); document.write( "1/5 + 1/x + 1/(x-2) = 1/3
\n" ); document.write( "Multiply thru by 15x(x-2):
\n" ); document.write( "3x(x-2) + 15(x-2) + 15x = 5x(x-2)
\n" ); document.write( "etc.
\n" ); document.write( "I'll let you finish this.
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "
\n" );