document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=871396>Question 871396</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Eric can paint a room in 9 hours. Working together, Eric and Matt can paint the room in 4 hours. How long will it take Matt to paint the room by himself? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #525508 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=525508\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Eric's rate of painting is <BR>\n" );
document.write( "( 1 room painted ) / ( 9 hrs )<BR>\n" );
document.write( "Together, their rate is:<BR>\n" );
document.write( "( 1 room painted ) / ( 4 hrs )<BR>\n" );
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document.write( "Let Matt's rate of painting =<BR>\n" );
document.write( "( 1 room painted ) / ( t hrs )<BR>\n" );
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document.write( "Add their rates to get their rate <BR>\n" );
document.write( "working together<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1%2F9+%2B+1%2Ft+=+1%2F4+ ALIGN=MIDDLE  ALT=\"+1%2F9+%2B+1%2Ft+=+1%2F4+\"   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=+36t+ ALIGN=MIDDLE  ALT=\"+36t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+4t+%2B+36+=+9t+ ALIGN=MIDDLE  ALT=\"+4t+%2B+36+=+9t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+5t+=+36+ ALIGN=MIDDLE  ALT=\"+5t+=+36+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+7.2+ ALIGN=MIDDLE  ALT=\"+t+=+7.2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Note that <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+.2+ ALIGN=MIDDLE  ALT=\"+.2+\"   DISABLED_style= \"max-width:90%; height:auto;\" > hrs = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+.2%2A60+=+12+ ALIGN=MIDDLE  ALT=\"+.2%2A60+=+12+\"   DISABLED_style= \"max-width:90%; height:auto;\" > min<BR>\n" );
document.write( "----------------<BR>\n" );
document.write( "Matt can paint the room by himself in 7 hrs 12 min<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );