document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1154081>Question 1154081</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Mary is now four times as old as her daughter. Four years ago,the product of their ages was 40. Find their present ages. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #776442 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=776442\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> \r<BR>\n" );
document.write( "\n" );
document.write( "Mary is now four times as old as her daughter. Four years ago,the product of their ages was 40. Find their present ages.\r<BR>\n" );
document.write( "\n" );
document.write( "If daughter is x <BR>\n" );
document.write( "Mother's age = 4x\r<BR>\n" );
document.write( "\n" );
document.write( "4 years ago<BR>\n" );
document.write( "daughter's age = x-4<BR>\n" );
document.write( "Mother's age = 4x-4\r<BR>\n" );
document.write( "\n" );
document.write( "Product of ages (x-4)((4x-4)\r<BR>\n" );
document.write( "\n" );
document.write( "(x-4)((4x-4)=40\r<BR>\n" );
document.write( "\n" );
document.write( "expand\r<BR>\n" );
document.write( "\n" );
document.write( "4x^2-4x-16x+16 =40\r<BR>\n" );
document.write( "\n" );
document.write( "4x^2-20x-24=0\r<BR>\n" );
document.write( "\n" );
document.write( "x^2-5x-6=0\r<BR>\n" );
document.write( "\n" );
document.write( "x^2-6x+x-6=0\r<BR>\n" );
document.write( "\n" );
document.write( "x(x-6)+1(x-6)=0\r<BR>\n" );
document.write( "\n" );
document.write( "(x-6)(x+1)=0\r<BR>\n" );
document.write( "\n" );
document.write( "x=6 or -1\r<BR>\n" );
document.write( "\n" );
document.write( "age cannot be negative<BR>\n" );
document.write( "x=6\r<BR>\n" );
document.write( "\n" );
document.write( "continue </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );