document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1101866>Question 1101866</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A man can do a job in 10 hours and his younger son can do it in 12 hours. After the father and his younger son have been working for 1 hour, the older son joins them, and the three completed the job in 3 more hours. How long will it take the older son to do the job?<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 #716484 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=716484\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Man's rate is:<BR>\n" );
document.write( "[ 1 job ] / [ 10 hrs ]<BR>\n" );
document.write( "Younger son's rate is:<BR>\n" );
document.write( "[ 1 job ] / [ 12 hrs ]<BR>\n" );
document.write( "Let older son's rate =<BR>\n" );
document.write( "[ 1 job ] / [ t hrs ]<BR>\n" );
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document.write( "Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+x+ ALIGN=MIDDLE  ALT=\"+x+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = the fraction of the <BR>\n" );
document.write( "job man and younger son get done<BR>\n" );
document.write( "in 1 hr<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%2F10+%2B+1%2F12+=+x%2F1+ ALIGN=MIDDLE  ALT=\"+1%2F10+%2B+1%2F12+=+x%2F1+\"   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=+60+ ALIGN=MIDDLE  ALT=\"+60+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+6+%2B+5+=+60x+ ALIGN=MIDDLE  ALT=\"+6+%2B+5+=+60x+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+60x+=+11+ ALIGN=MIDDLE  ALT=\"+60x+=+11+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+x+=+11%2F60+ ALIGN=MIDDLE  ALT=\"+x+=+11%2F60+\"   DISABLED_style= \"max-width:90%; height:auto;\" > is the fraction that gets done.<BR>\n" );
document.write( "There is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+49%2F60+ ALIGN=MIDDLE  ALT=\"+49%2F60+\"   DISABLED_style= \"max-width:90%; height:auto;\" > of the job left to do<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1%2F10+%2B+1%2F12+%2B+1%2Ft+=+%28%28+49%2F60+%29%29%2F3+ ALIGN=MIDDLE  ALT=\"+1%2F10+%2B+1%2F12+%2B+1%2Ft+=+%28%28+49%2F60+%29%29%2F3+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1%2F10+%2B+1%2F12+%2B+1%2Ft+=+49%2F180+ ALIGN=MIDDLE  ALT=\"+1%2F10+%2B+1%2F12+%2B+1%2Ft+=+49%2F180+\"   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=+180t+ ALIGN=MIDDLE  ALT=\"+180t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+18t+%2B+15t+%2B+180+=+49t+ ALIGN=MIDDLE  ALT=\"+18t+%2B+15t+%2B+180+=+49t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+33t+%2B+180+=+49t+ ALIGN=MIDDLE  ALT=\"+33t+%2B+180+=+49t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+16t+=+180+ ALIGN=MIDDLE  ALT=\"+16t+=+180+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+11.25+ ALIGN=MIDDLE  ALT=\"+t+=+11.25+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Working alone, the older son<BR>\n" );
document.write( "can do the job is 11 hrs 15 min<BR>\n" );
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document.write( "Get another opinion if needed\r<BR>\n" );
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