document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=987664>Question 987664</A>: <I><SPAN STYLE=\"word-break: break-all;\"> At present, john's age is 30% of his father's age. Twenty years from now, john's age will be 58% of his father's age. How old are they? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #608391 by </B><A HREF=/tutors/aboutme.mpl?userid=macston><B>macston(5194)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=macston><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=macston><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=608391\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .<BR>\n" );
document.write( "J=John's current age; F=father's current age<BR>\n" );
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document.write( "J=0.30F Use this to substitute for J.<BR>\n" );
document.write( "J+20=0.58(F+20) Substitute for J.<BR>\n" );
document.write( "0.30F+20=0.58F+11.6<BR>\n" );
document.write( "8.4=0.28F <BR>\n" );
document.write( "30=F ANSWER 1:Father is 30 years old.<BR>\n" );
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document.write( "J=0.30F=(0.30)30=9 ANSWER 2: John is 9 years old.<BR>\n" );
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document.write( "CHECK:<BR>\n" );
document.write( "J+20=0.58(F+20)<BR>\n" );
document.write( "9+20=0.58(30+20)<BR>\n" );
document.write( "29=0.58(50)<BR>\n" );
document.write( "29=29<BR>\n" );
document.write( " </SPAN>\n" );
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