document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=885705>Question 885705</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a father and a son working together can finish painting a room in 6 hours. working alone, the father takes 9 hours to do the painting. how many painting hours will it take the son, working alone to finish the painting room? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #535391 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=535391\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Add their rates of painting to get their<BR>\n" );
document.write( "rate painting together<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;\" > = time in hours for son to paint<BR>\n" );
document.write( "the room working alone<BR>\n" );
document.write( "----------------------------<BR>\n" );
document.write( "( 1 room ) / ( 9 hrs ) + ( 1 room ) / ( t hrs ) = ( 1 room ) / ( 6 hrs )<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1%2F9+%2B+1%2Ft+=+1%2F6+ ALIGN=MIDDLE  ALT=\"+1%2F9+%2B+1%2Ft+=+1%2F6+\"   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=+54t+ ALIGN=MIDDLE  ALT=\"+54t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+6t+%2B+54+=+9t+ ALIGN=MIDDLE  ALT=\"+6t+%2B+54+=+9t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+3t+=+54+ ALIGN=MIDDLE  ALT=\"+3t+=+54+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+18+ ALIGN=MIDDLE  ALT=\"+t+=+18+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "It takes the son 18 hours working alone to paint the room<BR>\n" );
document.write( "------------------<BR>\n" );
document.write( "check:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1%2F9+%2B+1%2Ft+=+1%2F6+ ALIGN=MIDDLE  ALT=\"+1%2F9+%2B+1%2Ft+=+1%2F6+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1%2F9+%2B+1%2F18+=+1%2F6+ ALIGN=MIDDLE  ALT=\"+1%2F9+%2B+1%2F18+=+1%2F6+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2%2F18+%2B+1%2F18+=+3%2F18+ ALIGN=MIDDLE  ALT=\"+2%2F18+%2B+1%2F18+=+3%2F18+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+3%2F18+=+3%2F18+ ALIGN=MIDDLE  ALT=\"+3%2F18+=+3%2F18+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "OK\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );