document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1122430>Question 1122430</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Mr Rashid is 4 time as old  his son.Four years ago,the sum of their ages was 37 years. Find the son's present age<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #738557 by </B><A HREF=/tutors/aboutme.mpl?userid=FrankM><B>FrankM(1040)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=FrankM><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=FrankM><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=738557\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> D = Dad's age now<BR>\n" );
document.write( "S= Son's age now\r<BR>\n" );
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document.write( "D = 4 S\r<BR>\n" );
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document.write( "Four years ago, Dad was D-4 years old and the son was S-4\r<BR>\n" );
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document.write( "(D-4)+(S-4) = 37\r<BR>\n" );
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document.write( "D+S-8 = 37\r<BR>\n" );
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document.write( "D+S=45\r<BR>\n" );
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document.write( "But we know D=4S so substitute \r<BR>\n" );
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document.write( "4S+S = 45\r<BR>\n" );
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document.write( "S= 9  (and D= 36 in case you wonder)\r<BR>\n" );
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