document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=876099>Question 876099</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Two years ago, my age was 4 times that of my son. In 3 years, my is only 3 times that of my son. What is our age now? The question asks for only one variable. I only know how to do it with two. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #528585 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=528585\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> You could say the son's age now   = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+ ALIGN=MIDDLE  ALT=\"+s+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "2 yrs ago, the son's age was <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+-+2+ ALIGN=MIDDLE  ALT=\"+s+-+2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "The father's age 2 yrs ago was <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+4%2A%28+s+-+2+%29+ ALIGN=MIDDLE  ALT=\"+4%2A%28+s+-+2+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "----------------------------------------<BR>\n" );
document.write( "So, now, 2 yrs later, the father's age is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+4%2A%28+s+-+2+%29+%2B+2+ ALIGN=MIDDLE  ALT=\"+4%2A%28+s+-+2+%29+%2B+2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "---------------------------------------------------<BR>\n" );
document.write( "In 3 yrs, the son will be <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+%2B+3+ ALIGN=MIDDLE  ALT=\"+s+%2B+3+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "In 3 yrs, the father will be <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+4%2A%28+s+-+2+%29+%2B+2+%2B+3+ ALIGN=MIDDLE  ALT=\"+4%2A%28+s+-+2+%29+%2B+2+%2B+3+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "--------------------------------------------<BR>\n" );
document.write( "You are given that:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+4%2A%28+s+-+2+%29+%2B+2+%2B+3+=+3%2A%28+s+%2B+3+%29+ ALIGN=MIDDLE  ALT=\"+4%2A%28+s+-+2+%29+%2B+2+%2B+3+=+3%2A%28+s+%2B+3+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "---------------------------------<BR>\n" );
document.write( "Solve for <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+ ALIGN=MIDDLE  ALT=\"+s+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+4s+-+8+%2B+5+=+3s+%2B+9+ ALIGN=MIDDLE  ALT=\"+4s+-+8+%2B+5+=+3s+%2B+9+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+=+12+ ALIGN=MIDDLE  ALT=\"+s+=+12+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "and, the father's age now is:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+4%2A%28+s+-+2+%29+%2B+2+ ALIGN=MIDDLE  ALT=\"+4%2A%28+s+-+2+%29+%2B+2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+4%2A%28+12+-+2+%29+%2B+2+=+42+ ALIGN=MIDDLE  ALT=\"+4%2A%28+12+-+2+%29+%2B+2+=+42+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "--------------------------<BR>\n" );
document.write( "The father is 42 and the son is 12<BR>\n" );
document.write( "check:<BR>\n" );
document.write( "2 yrs ago,<BR>\n" );
document.write( "f = 40<BR>\n" );
document.write( "s = 10<BR>\n" );
document.write( "Father's age is 4 times the son's<BR>\n" );
document.write( "-------------<BR>\n" );
document.write( "In 3 yrs:<BR>\n" );
document.write( "f = 45<BR>\n" );
document.write( "s = 15 <BR>\n" );
document.write( "Father's age is 3 times the son's<BR>\n" );
document.write( "OK\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );