document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=513603>Question 513603</A>: <I><SPAN STYLE=\"word-break: break-all;\">  The Sum of the ages of A and B is 42 years.\r<BR>\n" );
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document.write( "3 years back, the age of A was 5 times the age of B. Find the difference between the present ages of A and B.\r<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 #344094 by </B><A HREF=/tutors/aboutme.mpl?userid=Maths68><B>Maths68(1474)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Maths68><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=Maths68><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=344094\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let <BR>\n" );
document.write( "Present age of A = a<BR>\n" );
document.write( "Present age of B = b\r<BR>\n" );
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document.write( "The Sum of the ages of A and B is 42 years.<BR>\n" );
document.write( "a+b=42<BR>\n" );
document.write( "a=42-b..........(1)<BR>\n" );
document.write( "3 years back<BR>\n" );
document.write( "a-3=b-3<BR>\n" );
document.write( "then<BR>\n" );
document.write( "the age of A was 5 times the age of B<BR>\n" );
document.write( "a-3=5(b-3)<BR>\n" );
document.write( "a-3=5b-15<BR>\n" );
document.write( "a=5b-15+3<BR>\n" );
document.write( "a=5b-12.............(2)<BR>\n" );
document.write( "Subtitue the value of a in (2) from (1)<BR>\n" );
document.write( "42-b=5b-12<BR>\n" );
document.write( "-b-5b=-12-42<BR>\n" );
document.write( "-6b=-54<BR>\n" );
document.write( "-6b/-6=-54/-6<BR>\n" );
document.write( "b=9<BR>\n" );
document.write( "Put the value of b in (1)<BR>\n" );
document.write( "a=42-9<BR>\n" );
document.write( "a=33<BR>\n" );
document.write( "Present age of A = a = 33 years old<BR>\n" );
document.write( "Present age of B = b = 9 years old\r<BR>\n" );
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document.write( "Three years bakc B was = 9-3 = 6<BR>\n" );
document.write( "Three years bakc A was = 33-3 = 30 (which is 5 times of 6) \r<BR>\n" );
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