document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=224466>Question 224466</A>: <I><SPAN STYLE=\"word-break: break-all;\"> kim is 1/3 the age of her older sister sue.  in 13 years, sue will be one year younger than twice kim's age.  how old is sue?\r<BR>\n" );
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document.write( "Please help me.  Thanks! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #167792 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=167792\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let k = Kim's present age<BR>\n" );
document.write( "Let s = Sue's present age<BR>\n" );
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document.write( "Write an equation for each statement:<BR>\n" );
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document.write( "\"kim is 1/3 the age of her older sister sue.\"<BR>\n" );
document.write( "k = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F3 ALIGN=MIDDLE  ALT=\"1%2F3\"   DISABLED_style= \"max-width:90%; height:auto;\" >s<BR>\n" );
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document.write( "s = 3k; may use it this way for substitution<BR>\n" );
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document.write( "\" in 13 years, sue will be one year younger than twice kim's age.\"<BR>\n" );
document.write( "s + 13 = 2(k + 13) - 1<BR>\n" );
document.write( "Simplify the equation as much as possible <BR>\n" );
document.write( "s + 13 = 2k + 26 - 1<BR>\n" );
document.write( "s + 13 = 2k + 25<BR>\n" );
document.write( "s = 2k + 25 - 13<BR>\n" );
document.write( "s = 2k + 12<BR>\n" );
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document.write( " how old is sue?<BR>\n" );
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document.write( "Substitute 3k for s in the above equation, find k<BR>\n" );
document.write( "3k = 2k + 12<BR>\n" );
document.write( "3k - 2k = 12<BR>\n" );
document.write( "k = 12 yrs is Kim's present age<BR>\n" );
document.write( "then<BR>\n" );
document.write( "s = 3k<BR>\n" );
document.write( "s = 3(12)<BR>\n" );
document.write( "s = 36 is Sue's present age<BR>\n" );
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document.write( "Check our solution in the statement:<BR>\n" );
document.write( "\"in 13 years, sue will be one year younger than twice kim's age.<BR>\n" );
document.write( "36 + 13 = 2(12 + 13) - 1<BR>\n" );
document.write( "49 = 2(25) - 1; confirms our solution <BR>\n" );
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document.write( "Did this make sense to you? </SPAN>\n" );
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