document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=599004>Question 599004</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Alex is 4 years older than mark. Mark's age is 4/5 Alex's age. What are their ages? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #378763 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=378763\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Alex is 4 years older than mark. Mark's age is 4/5 Alex's age. What are their ages?<BR>\n" );
document.write( "------<BR>\n" );
document.write( "Equations:<BR>\n" );
document.write( "a = m + 4<BR>\n" );
document.write( "m = (4/5)a<BR>\n" );
document.write( "----<BR>\n" );
document.write( "Substitute for \"m\" and solve for \"a\":<BR>\n" );
document.write( "a = (4/5)a + 4<BR>\n" );
document.write( "(1/5)a = 4<BR>\n" );
document.write( "a = 20 yrs (Alex's age)<BR>\n" );
document.write( "----<BR>\n" );
document.write( "Solve for \"m\":<BR>\n" );
document.write( "m = (4/5)a = (4/5)20 = 16 yrs (Mark's age)<BR>\n" );
document.write( "=====================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );