document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=128773>Question 128773</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Kobe completed a certain job in 20 hrs. Together, Kobe and Justin completed the same job in 12 hrs. How long would it take Justin to complete by himself?<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #94203 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley71><B>checkley71(8403)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley71><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=94203\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 20X/(20+X)=12 CROSS MULTIPLY<BR>\n" );
document.write( "20X=12(20+X)<BR>\n" );
document.write( "20X=240+12X<BR>\n" );
document.write( "20X-12X=240<BR>\n" );
document.write( "8X=240<BR>\n" );
document.write( "X=240/8<BR>\n" );
document.write( "X=30 HRS FOR JUSTIN WORKING ALONE TO COMPLETE THE JOB.<BR>\n" );
document.write( "PROOF:<BR>\n" );
document.write( "20*30/(20+30)=12<BR>\n" );
document.write( "600/50=12<BR>\n" );
document.write( "12=12<BR>\n" );
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