document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=397646>Question 397646</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 6 years ago bob was 4 times as old as Mary. In 4 years he will be twice as old as Mary. How old are they? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #281756 by </B><A HREF=/tutors/aboutme.mpl?userid=richard1234><B>richard1234(7193)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richard1234><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=richard1234><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=281756\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let b and m be Bob's and Mary's ages. Then,\r<BR>\n" );
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document.write( "b-6 = 4(m-6) --> b-6 = 4m - 24\r<BR>\n" );
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document.write( "b+4 = 2(m+4) --> b+4 = 2m + 8\r<BR>\n" );
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document.write( "This is essentially a system of equations that can be solved for b and m. Solving using any method (I used substitution), we get m = 11, b = 26, so Mary is 11 and Bob is 26. </SPAN>\n" );
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