document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1151780>Question 1151780</A>: <I><SPAN STYLE=\"word-break: break-all;\"> At present, Pedro's age is 25% of his father age. Twenty years from now, Pedro's age will be 50% 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 #773629 by </B><A HREF=/tutors/aboutme.mpl?userid=rothauserc><B>rothauserc(4718)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rothauserc><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=rothauserc><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=773629\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let P be Pedro's age and F be his father's age, then<BR>\n" );
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document.write( "P = F/4<BR>\n" );
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document.write( "(P +20) = (F +20)/2<BR>\n" );
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document.write( "substitute for P in the second equation<BR>\n" );
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document.write( "(F/4 +20) = (F +20)/2<BR>\n" );
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document.write( "multiply both sides of = by 4<BR>\n" );
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document.write( "F +80 = 2F +40<BR>\n" );
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document.write( "F = 40<BR>\n" );
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document.write( "P = F/4 = 40/4 = 10<BR>\n" );
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document.write( "Pedro is 10 years old and Pedro's father is 40 years old<BR>\n" );
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