document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1081575>Question 1081575</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Five notebooks and a pack of pencils costs $7. Two notebooks and 2 packs of pencils cost $4. How much does a notebook cost  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #695628 by </B><A HREF=/tutors/aboutme.mpl?userid=math_helper><B>math_helper(2461)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=math_helper><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=math_helper><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=695628\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> (1) 5N+P = 7<BR>\n" );
document.write( "(2) 2N+2P = 4\r<BR>\n" );
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document.write( "(1) ==>  P = 7-5N<BR>\n" );
document.write( "Subs into (2):\r<BR>\n" );
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document.write( "   2N + 2(7-5N) = 4<BR>\n" );
document.write( "   2N + 14 - 10N = 4<BR>\n" );
document.write( "    -8N = -10  <BR>\n" );
document.write( "       <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28+N+=+1.25%29+ ALIGN=MIDDLE  ALT=\"highlight%28+N+=+1.25%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" >  \r<BR>\n" );
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document.write( "—<BR>\n" );
document.write( "Check:   N=1.25 —> P=0.75<BR>\n" );
document.write( "         (1) 5(1.25) + 0.75 = 6.25 +0.75 = 7  (ok)<BR>\n" );
document.write( "         (2) 2(1.25) + 2(0.75) = 2.5 + 1.5 = 4 (ok)<BR>\n" );
document.write( " </SPAN>\n" );
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