document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=253305>Question 253305</A>: <I><SPAN STYLE=\"word-break: break-all;\"> mary is twice mark's age; if the difference in their ages are 24. how old is mark </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #185593 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=185593\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> For everything we know, we write an equation.<BR>\n" );
document.write( "mary=y<BR>\n" );
document.write( "mark=k<BR>\n" );
document.write( "y=2k<BR>\n" );
document.write( "y-k=24<BR>\n" );
document.write( "We can do this several ways.<BR>\n" );
document.write( "Since we already have one equation y=2k let's substitute 2k for y in the other<BR>\n" );
document.write( "2k-k=24<BR>\n" );
document.write( "k=24<BR>\n" );
document.write( "y=2k<BR>\n" );
document.write( "y=48<BR>\n" );
document.write( "mary is 48 and mark is 24.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );