document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=518777>Question 518777</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Rob can deliver papers 4 times as fast as his younger brother.  If they work together, it takes them 2 hours.  How long would it take each to deliver the papers alone? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #345255 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=345255\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Call delivering the papers 1 job<BR>\n" );
document.write( "Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+ ALIGN=MIDDLE  ALT=\"+t+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = Rob's time to deliver the papers in hours<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+4t+ ALIGN=MIDDLE  ALT=\"+4t+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = younger brother's time <BR>\n" );
document.write( "Add their rates to get rate working together<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1%2Ft+%2B+1%2F%284t%29+=+1%2F2+ ALIGN=MIDDLE  ALT=\"+1%2Ft+%2B+1%2F%284t%29+=+1%2F2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Multiply both sides by <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4t ALIGN=MIDDLE  ALT=\"4t\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+4+%2B+1+=+2t+ ALIGN=MIDDLE  ALT=\"+4+%2B+1+=+2t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2t+=+5+ ALIGN=MIDDLE  ALT=\"+2t+=+5+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+5%2F2+ ALIGN=MIDDLE  ALT=\"+t+=+5%2F2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+4t+=+10+ ALIGN=MIDDLE  ALT=\"+4t+=+10+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Rob's time working alone is 2.5 hrs<BR>\n" );
document.write( "Brother's time working alone is 10 hrs </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );