document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=907240>Question 907240</A>: <I><SPAN STYLE=\"word-break: break-all;\"> It takes Ralph 12 hours to paint a fence alone. Lisa can do the same job in 16 hours. If Ralph paints alone for 15 minutes before Lisa begins helping, how long must they work together to finish painting the fence? Give your answer as a simplified fraction.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #550356 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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/cgi-bin/show-face.mpl?user=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=550356\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> c/a+ x/a+x/b=1<BR>\n" );
document.write( "(15/60)*1/12+ x/12+x/16=1<BR>\n" );
document.write( "0.25*1/12+x/12+x/16=1<BR>\n" );
document.write( "x/12+x/16=1-0.25/12<BR>\n" );
document.write( "x/12+x/16=0.97916667<BR>\n" );
document.write( "x/12+x/16=11.75/12<BR>\n" );
document.write( "16x/192+12x/192=188/192<BR>\n" );
document.write( "28x/192=188/192<BR>\n" );
document.write( "28x=188<BR>\n" );
document.write( "x=188/28<BR>\n" );
document.write( "x=47/7 this is the simplified fraction\r<BR>\n" );
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