document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=430160>Question 430160</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The sum of ages of father and a son is 45 years.5 years ago the product of their ages was 4 times the fathers age at that time.Find the present ages of father and son? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #298733 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=298733\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The sum of ages of father and a son is 45 years.5 years ago the product of their ages was 4 times the fathers age at that time.Find the present ages of father and son?<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Equations:<BR>\n" );
document.write( "f + s = 45<BR>\n" );
document.write( "(f-5)(s-5)=4(f-5)<BR>\n" );
document.write( "----<BR>\n" );
document.write( "Substitute for \"f\" and solve for \"s\":<BR>\n" );
document.write( "f = 45-s<BR>\n" );
document.write( "(45-s-5)(s-5) = 4(45-s-5)<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Divide both sides by 45-s-5 to get:<BR>\n" );
document.write( "s-5 = 4<BR>\n" );
document.write( "s = 9 (son's age now)<BR>\n" );
document.write( "----<BR>\n" );
document.write( "Solve for \"f\":<BR>\n" );
document.write( "f+9 = 45<BR>\n" );
document.write( "f = 36 (father's age now)<BR>\n" );
document.write( "============================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );