document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=300087>Question 300087</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Mark is twice as old as Dave. In four years the sum of their ages will be 26. How old is Mark today? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #217369 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=217369\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Mark is twice as old as Dave. In four years the sum of their ages will be 26. How old is Mark today?<BR>\n" );
document.write( "M=2D<BR>\n" );
document.write( "(M+4)+(D+4)=26, M+D+8=26, M+D=18<BR>\n" );
document.write( "2D+D=18<BR>\n" );
document.write( "3D=18<BR>\n" );
document.write( "D=6<BR>\n" );
document.write( "M=2(6)<BR>\n" );
document.write( "M=12<BR>\n" );
document.write( "M=Mark<BR>\n" );
document.write( "D=Dave </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );