document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=889435>Question 889435</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a man is now 5 times as old as his son. Four years ago,the product of their ages was 52.Find their present age? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #538727 by </B><A HREF=/tutors/aboutme.mpl?userid=Nigelyul><B>Nigelyul(18)</B></A><img src=\"/images/stars/stars-06.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Nigelyul><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=Nigelyul><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=538727\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let \"M\" be the age of the man<BR>\n" );
document.write( "\"S\" be the age of the son\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=M=5S ALIGN=MIDDLE  ALT=\"M=5S\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28M-4%29%28S-4%29+=+52 ALIGN=MIDDLE  ALT=\"%28M-4%29%28S-4%29+=+52\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=MS+-4M+-+4S+%2B+16+=+52 ALIGN=MIDDLE  ALT=\"MS+-4M+-+4S+%2B+16+=+52\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5S%28S%29+-+4%285S%29+-+4S+=+36 ALIGN=MIDDLE  ALT=\"5S%28S%29+-+4%285S%29+-+4S+=+36\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5S%5E2+-+24S+-+36+=+0+ ALIGN=MIDDLE  ALT=\"5S%5E2+-+24S+-+36+=+0+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%285S+%2B+6%29%28S+-+6%29=0 ALIGN=MIDDLE  ALT=\"%285S+%2B+6%29%28S+-+6%29=0\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( "The possible values would be<BR>\n" );
document.write( "A.)<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5S+%2B+6+=+0 ALIGN=MIDDLE  ALT=\"5S+%2B+6+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "   <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5S+=+-6+ ALIGN=MIDDLE  ALT=\"5S+=+-6+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "   <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=S+=+%28-6%2F5%29 ALIGN=MIDDLE  ALT=\"S+=+%28-6%2F5%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( "B.)<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=S+-+6+=+0 ALIGN=MIDDLE  ALT=\"S+-+6+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+S+=+6+ ALIGN=MIDDLE  ALT=\"+S+=+6+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Since age cannot be negative, the son's only possible age would be 6.\r<BR>\n" );
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document.write( "Substitute <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=M+=+5%286%29 ALIGN=MIDDLE  ALT=\"M+=+5%286%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=M+=+30 ALIGN=MIDDLE  ALT=\"M+=+30\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Therefore, the man's age is 30 years old and the son's age is 6. </SPAN>\n" );
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