document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=56767>Question 56767</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 9.	Sally bought three chocolate bars and a pack of gum and paid $1.75.  Jake bought two chocolate bars and four packs of gum and paid $2.00.  Find the cost of a chocolate bar and the cost of a pack of gum.<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #38551 by </B><A HREF=/tutors/aboutme.mpl?userid=funmath><B>funmath(2933)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=funmath><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=38551\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 9.	Sally bought three chocolate bars and a pack of gum and paid $1.75.  Jake bought two chocolate bars and four packs of gum and paid $2.00.  Find the cost of a chocolate bar and the cost of a pack of gum.<BR>\n" );
document.write( "Let the price of the chocolate be:x<BR>\n" );
document.write( "Let the price of the gum be:y<BR>\n" );
document.write( "Then Sally's equation is:<BR>\n" );
document.write( "3x+y=1.75<BR>\n" );
document.write( "Jake's equation is:<BR>\n" );
document.write( "2x+4y=2.00<BR>\n" );
document.write( "Solve Sally's equation for y and substitute that into Jake's equation and solve for x:<BR>\n" );
document.write( "3x+y=1.75<BR>\n" );
document.write( "-3x+3x+y=1.75-3x<BR>\n" );
document.write( "y=1.75-3x<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2x%2B4%2Ahighlight%281.75-3x%29=2.00 ALIGN=MIDDLE  ALT=\"2x%2B4%2Ahighlight%281.75-3x%29=2.00\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2x%2B7-12x=2 ALIGN=MIDDLE  ALT=\"2x%2B7-12x=2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-10x%2B7=2 ALIGN=MIDDLE  ALT=\"-10x%2B7=2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-10x%2B7-7=2-7 ALIGN=MIDDLE  ALT=\"-10x%2B7-7=2-7\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-10x=-5 ALIGN=MIDDLE  ALT=\"-10x=-5\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-10x%2F-10=-5%2F-10 ALIGN=MIDDLE  ALT=\"-10x%2F-10=-5%2F-10\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=.50 ALIGN=MIDDLE  ALT=\"x=.50\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Substitute that itnto Sally's equation for x and solve for y:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3%2Ahighlight%28.50%29%2By=1.75 ALIGN=MIDDLE  ALT=\"3%2Ahighlight%28.50%29%2By=1.75\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1.50%2By=1.75 ALIGN=MIDDLE  ALT=\"1.50%2By=1.75\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-1.50%2B1.50%2By=1.75-1.50 ALIGN=MIDDLE  ALT=\"-1.50%2B1.50%2By=1.75-1.50\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=.25 ALIGN=MIDDLE  ALT=\"y=.25\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "The chocolate cost x=$.50 and the gum cost y=$.25<BR>\n" );
document.write( "Happy Calculating!!!  </SPAN>\n" );
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