document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=24710>Question 24710</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In 15 years, Maya will be twice as old as David is now. In 15 years David will be as old as Maya will be 10 years from now. How old are they now? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #13172 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=13172\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Read these carefully<BR>\n" );
document.write( "d = David's age now<BR>\n" );
document.write( "m = Maya's age now<BR>\n" );
document.write( "(1) m + 15 = 2 * d<BR>\n" );
document.write( "(2) d + 15 = m + 10<BR>\n" );
document.write( "from (1)<BR>\n" );
document.write( "d = (m + 15) / 2<BR>\n" );
document.write( "substituting this in (2)<BR>\n" );
document.write( "(m + 15)/2 + 15 = m + 10<BR>\n" );
document.write( "multiply through by 2<BR>\n" );
document.write( "m + 15 + 30 = 2 * m + 20<BR>\n" );
document.write( "subtract m from both sides<BR>\n" );
document.write( "subtract 20 from both sides<BR>\n" );
document.write( "m = 25<BR>\n" );
document.write( "d = (25 + 15) / 2<BR>\n" );
document.write( "d = 20<BR>\n" );
document.write( "check<BR>\n" );
document.write( "20 = (25 + 15) / 2<BR>\n" );
document.write( "OK<BR>\n" );
document.write( "25 + 15 = 2 * 20<BR>\n" );
document.write( "OK </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );