document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1019531>Question 1019531</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The father's age 20 years ago is equal to his son's age 10 from now. If the sum of their ages is 50, how old is each now? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #635513 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39617)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=635513\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> f, father now<BR>\n" );
document.write( "s, son now\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=system%28f-20=s%2B10%2Cf%2Bs=50%29 ALIGN=MIDDLE  ALT=\"system%28f-20=s%2B10%2Cf%2Bs=50%29\"   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=f=s%2B10%2B20 ALIGN=MIDDLE  ALT=\"f=s%2B10%2B20\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=f=s%2B30 ALIGN=MIDDLE  ALT=\"f=s%2B30\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "-<BR>\n" );
document.write( "substitute:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28s%2B30%29%2Bs=50 ALIGN=MIDDLE  ALT=\"%28s%2B30%29%2Bs=50\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2s%2B30=50 ALIGN=MIDDLE  ALT=\"2s%2B30=50\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s%2B15=25 ALIGN=MIDDLE  ALT=\"s%2B15=25\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28s=10%29 ALIGN=MIDDLE  ALT=\"highlight%28s=10%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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