document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=300769>Question 300769</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Applications of linear systems- solve using two equation and two variables<BR>\n" );
document.write( " <BR>\n" );
document.write( " An office suply store in San  Diego sells 7 writing tablets and 4 pens for $6.40. Also, 2 tablets and 19 pens cost $5.40. Find the price of each one </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #215801 by </B><A HREF=/tutors/aboutme.mpl?userid=Fombitz><B>Fombitz(32388)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Fombitz><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=Fombitz><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=215801\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let W be the price of writing tablets, P be the price of pens.<BR>\n" );
document.write( "1.<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=7W%2B4P=6.40 ALIGN=MIDDLE  ALT=\"7W%2B4P=6.40\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "2.<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2W%2B19P=5.40 ALIGN=MIDDLE  ALT=\"2W%2B19P=5.40\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Multiply eq.1 by 2 and eq. 2 by (-7) and add them together to get rid of W.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%2814W%2B8P%29%2B%28-14W-133P%29=12.80-37.80 ALIGN=MIDDLE  ALT=\"%2814W%2B8P%29%2B%28-14W-133P%29=12.80-37.80\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=125P=25 ALIGN=MIDDLE  ALT=\"125P=25\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=P=0.2 ALIGN=MIDDLE  ALT=\"P=0.2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Then use either equation to solve for W.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=7W%2B4P=6.40 ALIGN=MIDDLE  ALT=\"7W%2B4P=6.40\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=7W%2B4%280.2%29=6.40 ALIGN=MIDDLE  ALT=\"7W%2B4%280.2%29=6.40\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=7W%2B0.80=6.40 ALIGN=MIDDLE  ALT=\"7W%2B0.80=6.40\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=7W=5.60 ALIGN=MIDDLE  ALT=\"7W=5.60\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=W=0.80 ALIGN=MIDDLE  ALT=\"W=0.80\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Writing tablets are $0.80 and pens are $0.20.  </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );