document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1122431>Question 1122431</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Carla is three times as old as John. Four years from now, Carla’s age will be half that of John’s. Find their present age. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #738582 by </B><A HREF=/tutors/aboutme.mpl?userid=Alex.33><B>Alex.33(110)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alex.33><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=Alex.33><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=738582\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Use their name initials to represent their age.<BR>\n" );
document.write( "C=3J<BR>\n" );
document.write( "C+4=(J+4)/2<BR>\n" );
document.write( "substitute C in the second equation:<BR>\n" );
document.write( "3J+2=J/2. It indicates that 3J is 2 less than J/2. Impossible.\r<BR>\n" );
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document.write( "So I'm assuming that 'Carla’s age will be half that of John’s' actually should be 'John's age will be half of Carla's'.<BR>\n" );
document.write( "C=3J<BR>\n" );
document.write( "(C+4)/2=J+4<BR>\n" );
document.write( "Solve for C and J:<BR>\n" );
document.write( "C=12<BR>\n" );
document.write( "J=4\r<BR>\n" );
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document.write( " </SPAN>\n" );
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