document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1010167>Question 1010167</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Christa is 7 years younger than Mark. 5 years hence, the sum of their ages will be 31. How old is each? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #625907 by </B><A HREF=/tutors/aboutme.mpl?userid=fractalier><B>fractalier(6550)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=fractalier><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=fractalier><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=625907\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Call their ages NOW, c and m.  We have<BR>\n" );
document.write( "c = m - 7  and<BR>\n" );
document.write( "(c + 5) + (m + 5) = 31<BR>\n" );
document.write( "Substitute and get<BR>\n" );
document.write( "(m - 7 + 5) + (m + 5) = 31<BR>\n" );
document.write( "2m + 3 = 31<BR>\n" );
document.write( "2m = 28<BR>\n" );
document.write( "m = 14<BR>\n" );
document.write( "c = 7 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );