document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=822831>Question 822831</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me solve this word problem<BR>\n" );
document.write( "Quinn  is  twice  as  old  as  Karl  and  four  years  older  than  Parker  the  sum  of  their  ages  is  21.  How  old  is  Parker?  Thank  you!  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #495110 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39617)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=495110\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I took out the rendering braces so we can read the description and question with much less trouble.\r<BR>\n" );
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document.write( "Using p as parker<BR>\n" );
document.write( "q as quinn<BR>\n" );
document.write( "k as Karl\r<BR>\n" );
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document.write( "q=2k;<BR>\n" );
document.write( "q=4+p;<BR>\n" );
document.write( "p+q+k=21.\r<BR>\n" );
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document.write( "Substitute for q in the age sum equation; and equate the right members of the first two equations, so you'll have two equations in just p and k.<BR>\n" );
document.write( "p+(2k)+k=21 and 2k=4+p;<BR>\n" );
document.write( "p+3k=21 and 2k=p+4;<BR>\n" );
document.write( "p+3k=21 and p-2k=-4.<BR>\n" );
document.write( "Now, with these two equations, if you will subtract one of them from the other, you can quickly get a value for k.  Elimination method, eliminating p.<BR>\n" );
document.write( "You obtain 5k=25,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28k=5%29 ALIGN=MIDDLE  ALT=\"highlight%28k=5%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
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document.write( "Now you can go back to the first equation for q;<BR>\n" );
document.write( "q=2k<BR>\n" );
document.write( "q=2*5<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28q=10%29 ALIGN=MIDDLE  ALT=\"highlight%28q=10%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Using second original equation,<BR>\n" );
document.write( "q=4+p<BR>\n" );
document.write( "10=4+p<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28p=6%29 ALIGN=MIDDLE  ALT=\"highlight%28p=6%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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