document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=447072>Question 447072</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A small heating unit takes 8 hours longer to melt a piece of iron than does a larger unit. Working together, the heating units can melt the iron in 3 hours. How long would it take each heating unit, working alone, to melt the iron? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #307824 by </B><A HREF=/tutors/aboutme.mpl?userid=jorel1380><B>jorel1380(3719)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jorel1380><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=jorel1380><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=307824\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 1/x+1/(x+8)=1/3<BR>\n" );
document.write( "3x+24+3x=x2+8x<BR>\n" );
document.write( "x2+2x-24=0<BR>\n" );
document.write( "(x+6)(x-4)=0<BR>\n" );
document.write( "x=-6 or 4<BR>\n" );
document.write( "Throwing out the negative answer, we get the larger unit needing 4 hours to melt the iron, and the smaller unit needing 12 hours.. </SPAN>\n" );
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