document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=133431>Question 133431</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Togethe, John and Mark can finish painting a house in 10 hours. Alone, John takes 4 hours longer than Mark to finish painting the same house. How long does Mark take to finish painting the house by himself?. Give your correct answer to correct 2 decimal places.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #97617 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><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=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=97617\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> let x=\"Mark's time\", so x+4=\"John's time\"\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10%2Fx%2B10%2F%28x%2B4%29=1 ALIGN=MIDDLE  ALT=\"10%2Fx%2B10%2F%28x%2B4%29=1\"   DISABLED_style= \"max-width:90%; height:auto;\" > __ multiplying by x(x+4) __ 10x+40+10x=x^2+4x\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "subtracting 20x+40 __ 0=x^2-16x-40\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "use quadratic formula to find x </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );