document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=919049>Question 919049</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Ten years ago, Alfred's age was three times that of his son Jerry. Fifteen years from now, Alfred's age will be twelve less than twice of Jerry's age. How old are they now? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #557446 by </B><A HREF=/tutors/aboutme.mpl?userid=MathLover1><B>MathLover1(20850)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathLover1><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=MathLover1><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=557446\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> \r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10 ALIGN=MIDDLE  ALT=\"10\"   DISABLED_style= \"max-width:90%; height:auto;\" > years ago <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Alfred ALIGN=MIDDLE  ALT=\"Alfred\"   DISABLED_style= \"max-width:90%; height:auto;\" >'s age was <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3 ALIGN=MIDDLE  ALT=\"3\"   DISABLED_style= \"max-width:90%; height:auto;\" > times that of his son <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Jerry ALIGN=MIDDLE  ALT=\"Jerry\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Alfred-10=3%28Jerry-10%29 ALIGN=MIDDLE  ALT=\"Alfred-10=3%28Jerry-10%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.........eq.1\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=15 ALIGN=MIDDLE  ALT=\"15\"   DISABLED_style= \"max-width:90%; height:auto;\" > years from now <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Alfred ALIGN=MIDDLE  ALT=\"Alfred\"   DISABLED_style= \"max-width:90%; height:auto;\" >'s age will be <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=12 ALIGN=MIDDLE  ALT=\"12\"   DISABLED_style= \"max-width:90%; height:auto;\" > less than twice of <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Jerry ALIGN=MIDDLE  ALT=\"Jerry\"   DISABLED_style= \"max-width:90%; height:auto;\" > age\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Alfred%2B15=2%28Jerry%2B15%29-12 ALIGN=MIDDLE  ALT=\"Alfred%2B15=2%28Jerry%2B15%29-12\"   DISABLED_style= \"max-width:90%; height:auto;\" >.........eq.2\r<BR>\n" );
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document.write( "solve the system:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Alfred-10=3%28Jerry-10%29 ALIGN=MIDDLE  ALT=\"Alfred-10=3%28Jerry-10%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.........eq.1<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Alfred%2B15=2%28Jerry%2B15%29-12 ALIGN=MIDDLE  ALT=\"Alfred%2B15=2%28Jerry%2B15%29-12\"   DISABLED_style= \"max-width:90%; height:auto;\" >.........eq.2<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Alfred-10=3%28Jerry-10%29 ALIGN=MIDDLE  ALT=\"Alfred-10=3%28Jerry-10%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.........eq.1 solve for <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Alfred ALIGN=MIDDLE  ALT=\"Alfred\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Alfred=3%28Jerry-10%29%2B10 ALIGN=MIDDLE  ALT=\"Alfred=3%28Jerry-10%29%2B10\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Alfred=3Jerry-30%2B10 ALIGN=MIDDLE  ALT=\"Alfred=3Jerry-30%2B10\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( " <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Alfred=3Jerry-20 ALIGN=MIDDLE  ALT=\"Alfred=3Jerry-20\"   DISABLED_style= \"max-width:90%; height:auto;\" >.......substitute in eq.2\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Alfred%2B15=2%28Jerry%2B15%29-12 ALIGN=MIDDLE  ALT=\"Alfred%2B15=2%28Jerry%2B15%29-12\"   DISABLED_style= \"max-width:90%; height:auto;\" >.........eq.2..solve for <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Jerry ALIGN=MIDDLE  ALT=\"Jerry\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3Jerry-5=2Jerry%2B30-12 ALIGN=MIDDLE  ALT=\"3Jerry-5=2Jerry%2B30-12\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3Jerry-2Jerry=5%2B18 ALIGN=MIDDLE  ALT=\"3Jerry-2Jerry=5%2B18\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28Jerry=23%29 ALIGN=MIDDLE  ALT=\"highlight%28Jerry=23%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "find <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Alfred=3Jerry-20 ALIGN=MIDDLE  ALT=\"Alfred=3Jerry-20\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Alfred=3%2A23-20 ALIGN=MIDDLE  ALT=\"Alfred=3%2A23-20\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Alfred=69-20 ALIGN=MIDDLE  ALT=\"Alfred=69-20\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28Alfred=49%29 ALIGN=MIDDLE  ALT=\"highlight%28Alfred=49%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "check:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10 ALIGN=MIDDLE  ALT=\"10\"   DISABLED_style= \"max-width:90%; height:auto;\" > years ago <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Alfred ALIGN=MIDDLE  ALT=\"Alfred\"   DISABLED_style= \"max-width:90%; height:auto;\" >'s age was <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=49-10=39 ALIGN=MIDDLE  ALT=\"49-10=39\"   DISABLED_style= \"max-width:90%; height:auto;\" > and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Jerry ALIGN=MIDDLE  ALT=\"Jerry\"   DISABLED_style= \"max-width:90%; height:auto;\" >'s age was <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=23-10=13 ALIGN=MIDDLE  ALT=\"23-10=13\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "as you can see, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=39 ALIGN=MIDDLE  ALT=\"39\"   DISABLED_style= \"max-width:90%; height:auto;\" > is times times more than <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=13 ALIGN=MIDDLE  ALT=\"13\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=15 ALIGN=MIDDLE  ALT=\"15\"   DISABLED_style= \"max-width:90%; height:auto;\" > years from now <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Alfred ALIGN=MIDDLE  ALT=\"Alfred\"   DISABLED_style= \"max-width:90%; height:auto;\" >'s age will be <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=49%2B15=64 ALIGN=MIDDLE  ALT=\"49%2B15=64\"   DISABLED_style= \"max-width:90%; height:auto;\" > and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Jerry ALIGN=MIDDLE  ALT=\"Jerry\"   DISABLED_style= \"max-width:90%; height:auto;\" >'s age will be <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=23%2B15=38 ALIGN=MIDDLE  ALT=\"23%2B15=38\"   DISABLED_style= \"max-width:90%; height:auto;\" > \r<BR>\n" );
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document.write( " than twice of <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Jerry ALIGN=MIDDLE  ALT=\"Jerry\"   DISABLED_style= \"max-width:90%; height:auto;\" > age is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%2A38=76 ALIGN=MIDDLE  ALT=\"2%2A38=76\"   DISABLED_style= \"max-width:90%; height:auto;\" > and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=76-64=12 ALIGN=MIDDLE  ALT=\"76-64=12\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );