document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=545486>Question 545486</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Mark's age next year will be three times as old as Kim's age two years ago. If their present ages add to 21, how old is each now? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #355600 by </B><A HREF=/tutors/aboutme.mpl?userid=oberobic><B>oberobic(2304)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=oberobic><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=355600\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> M + K = 21<BR>\n" );
document.write( "so<BR>\n" );
document.write( "M = 21-K<BR>\n" );
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document.write( "Mark's age next year:  M+1<BR>\n" );
document.write( "Kim's age 2 years ago:  K-2<BR>\n" );
document.write( "M+1 = 3*(K-2)<BR>\n" );
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document.write( "Substitute M = 21-K.<BR>\n" );
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document.write( "21-K +1 = 3K -6<BR>\n" );
document.write( "28 = 4K<BR>\n" );
document.write( "K = 7<BR>\n" );
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document.write( "M = 21-7<BR>\n" );
document.write( "M = 14<BR>\n" );
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document.write( "Check.<BR>\n" );
document.write( "M+1 =15<BR>\n" );
document.write( "3(K-2) = 15<BR>\n" );
document.write( "Correct.<BR>\n" );
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document.write( "Answer:  Mark is 14, and Kim is 7.<BR>\n" );
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document.write( "Done. </SPAN>\n" );
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