document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=52216>Question 52216</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Sally bought 3 chocolate bars and a pack of gum and paid $1.75.  Jake bought 2 chocolate bars and 4 packs of gum and paid $2.00.  Find the cost of a chocolate bar and the cost of a pack of gum. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #34789 by </B><A HREF=/tutors/aboutme.mpl?userid=tutorcecilia><B>tutorcecilia(2152)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=tutorcecilia><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=tutorcecilia><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=34789\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 3 choco. + 1 gum = $1.75<BR>\n" );
document.write( "2 choco. + 4 guns = $2.00<BR>\n" );
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document.write( "Re-writing:<BR>\n" );
document.write( "3x + 1y = 1.75<BR>\n" );
document.write( "2x + 4y = 2.00<BR>\n" );
document.write( "Solve using any method for solving a system of equations.<BR>\n" );
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document.write( "Using the method of elimination to solve:<BR>\n" );
document.write( "-2(3x + 1y = 1.75) <BR>\n" );
document.write( "+3(2x + 4y = 2.00)<BR>\n" );
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document.write( "-6x-2y=-3.5 <BR>\n" );
document.write( "+6x+12y=6<BR>\n" );
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document.write( "0x+10y=2.5<BR>\n" );
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document.write( "10y=2.5 [Solve for y]<BR>\n" );
document.write( "y=.25 cents per gum<BR>\n" );
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document.write( "Plug y=.25 back into either of the original equations<BR>\n" );
document.write( "3x + 1(.25) = 1.75 [Solve for x]<BR>\n" );
document.write( "3x+.25=1.75<BR>\n" );
document.write( "x=.50 cents per chocolate bar.<BR>\n" );
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document.write( "Checking:<BR>\n" );
document.write( "3x + 1y = 1.75  [Plug-in x=.50 and y=.25]<BR>\n" );
document.write( "3(.50) + 1(.25) = 1.75<BR>\n" );
document.write( "1.75=1.75 [Checks out]<BR>\n" );
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document.write( "Checking<BR>\n" );
document.write( "2x + 4y = 2.00 [Plug-in x=.50 and y=.25]<BR>\n" );
document.write( "2(.50)+4(.25)=2.00<BR>\n" );
document.write( "2=2 [checks out]<BR>\n" );
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document.write( " </SPAN>\n" );
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