document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=551663>Question 551663</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If a child were four times his present age, he would be half as old as his father is now. If his father is 30 years old, how old is the child now?<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #359857 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=359857\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> let c = child's present age<BR>\n" );
document.write( "let f = father's age<BR>\n" );
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document.write( "If a child were four times his present age, he would be half as old as his father is now.<BR>\n" );
document.write( "4c = .5f<BR>\n" );
document.write( "we can simplify, multiply both sides by 2<BR>\n" );
document.write( "8c = f<BR>\n" );
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document.write( "If his father is 30 years old, how old is the child now?<BR>\n" );
document.write( "8c = 30<BR>\n" );
document.write( "c = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=30%2F8 ALIGN=MIDDLE  ALT=\"30%2F8\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "c = 3.75 yrs old<BR>\n" );
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document.write( "Usually these problems have integer solutions, but not this one, check it out<BR>\n" );
document.write( "4(3.75) = .5(30)<BR>\n" );
document.write( "15 = 15 </SPAN>\n" );
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