document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=381940>Question 381940</A>: <I><SPAN STYLE=\"word-break: break-all;\"> it takes rob 4 hours to paint a room. it takes darrin 3 hours to paint a room the same size. how long it take them to paint a similar sized room together   </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #270826 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=270826\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  it takes rob 4 hours to paint a room. it takes darrin 3 hours to paint a room the same size. how long it take them to paint a similar sized room together <BR>\n" );
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document.write( "Rob rate = 1/4 job/hr<BR>\n" );
document.write( "Darrin rate = 1/3 job/hr<BR>\n" );
document.write( "Together rate = 1/x job/hr<BR>\n" );
document.write( "-------------------------------<BR>\n" );
document.write( "Equation:<BR>\n" );
document.write( "rate + rate = together rate<BR>\n" );
document.write( "1/4 + 1/3 = 1/x<BR>\n" );
document.write( "Multiply thru by 12x to get:<BR>\n" );
document.write( "3x + 4x = 12<BR>\n" );
document.write( "7x = 12<BR>\n" );
document.write( "x = 12/7<BR>\n" );
document.write( "x = 1hr and (5/12)60 min<BR>\n" );
document.write( "---<BR>\n" );
document.write( "x = 1 hr and 25 min<BR>\n" );
document.write( "================================================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );