document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=754065>Question 754065</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If a son is 1/4 his mother's age, and she is 21 years older than her son, how old is the son? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #458772 by </B><A HREF=/tutors/aboutme.mpl?userid=blueplanet><B>blueplanet(7)</B></A><img src=\"/images/stars/stars-05.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=blueplanet><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=blueplanet><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=458772\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let the mother's age be X.<BR>\n" );
document.write( "Her son age is X-21<BR>\n" );
document.write( "According to the equation, the son is 1/4 his mother's age. This means that:<BR>\n" );
document.write( "X-21 = X/4   ---- (1)<BR>\n" );
document.write( "Solving this equation, we get X=28, which is the mother's age. The son's age is 28-21= 7 years old. </SPAN>\n" );
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