document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=212323>Question 212323</A>: <I><SPAN STYLE=\"word-break: break-all;\"> This is my problem.\r<BR>\n" );
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document.write( "It takes two oil pipelines 30 minutes to fill a tank. One pipeline fills the tank in 45 minutes. How long will it take to fill the tank with the other pipeline alone?\r<BR>\n" );
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document.write( "I tried this:<BR>\n" );
document.write( "x+y=30<BR>\n" );
document.write( "y=1.5(x+y)\r<BR>\n" );
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document.write( "I got y=-3 and x=33 but it doesn't make since that y=-3. Can you help? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #160349 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley77><B>checkley77(12844)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley77><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=160349\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> XY/(X+Y)=30<BR>\n" );
document.write( "45Y/(45+Y)=30<BR>\n" );
document.write( "45Y=30(45+Y)<BR>\n" );
document.write( "45Y=1,350+30Y<BR>\n" );
document.write( "45Y-30Y=1,350<BR>\n" );
document.write( "15Y=1,350<BR>\n" );
document.write( "Y=1,350/15<BR>\n" );
document.write( "Y=90 MINUTES FOR THE SECOND PIPELINE TO FILL THE TANK WORKING ALONE.<BR>\n" );
document.write( "PROOF:<BR>\n" );
document.write( "45*90/(45+90)=30<BR>\n" );
document.write( "4,050/135=30<BR>\n" );
document.write( "30=30 </SPAN>\n" );
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