document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=310734>Question 310734</A>: <I><SPAN STYLE=\"word-break: break-all;\"> the sum of david's age and his mother's age is 30.david's mother is four times as old as david.how old is david? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #222216 by </B><A HREF=/tutors/aboutme.mpl?userid=JBarnum><B>JBarnum(2146)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=JBarnum><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=JBarnum><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=222216\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> D+M=30<BR>\n" );
document.write( "M=4D<BR>\n" );
document.write( "D+4D=30<BR>\n" );
document.write( "5D=30<BR>\n" );
document.write( "D=6<BR>\n" );
document.write( "M=24<BR>\n" );
document.write( "D=david<BR>\n" );
document.write( "M=mother </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );