document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=753887>Question 753887</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Jeff is 7 years older than Marty. The sum of their ages is 71. How old is Marty </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #458722 by </B><A HREF=/tutors/aboutme.mpl?userid=MathTherapy><B>MathTherapy(10552)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathTherapy><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=MathTherapy><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=458722\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "Jeff is 7 years older than Marty. The sum of their ages is 71. How old is Marty\r<BR>\n" );
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document.write( "Let Marty's and Jeff's ages be M, and J, respectively\r<BR>\n" );
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document.write( "Then: J = M + 7 ----- eq (i)\r<BR>\n" );
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document.write( "Also, J + M = 71 ------ eq (ii)\r<BR>\n" );
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document.write( "While a few methods can be used to solve this system, namely, substitution, elimination, graphing, etc., the easiest method HERE is that of substitution.\r<BR>\n" );
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document.write( "M + 7 + M = 71 ------ Substituting M + 7 for J in eq (ii)\r<BR>\n" );
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document.write( "2M = 64\r<BR>\n" );
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document.write( "M, or Marty's current age = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=64%2F2 ALIGN=MIDDLE  ALT=\"64%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" >, or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%2832%29 ALIGN=MIDDLE  ALT=\"highlight_green%2832%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "You can do the check!!\r<BR>\n" );
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document.write( "Send comments and “thank-yous” to “D” at MathMadEzy@aol.com </SPAN>\n" );
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