document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=57521>Question 57521</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Sally brought 3 chocolate bars and a pack of gum and paid $1.75. Jake brought 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. Thanks William </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #39261 by </B><A HREF=/tutors/aboutme.mpl?userid=rcmcc><B>rcmcc(152)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rcmcc><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=rcmcc><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=39261\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> let the chocolate bars be X<BR>\n" );
document.write( "Let gum be Y\r<BR>\n" );
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document.write( "form 2 linear equations to find for x and y,<BR>\n" );
document.write( "3X+Y=1.75<BR>\n" );
document.write( "2X+4Y=2.00\r<BR>\n" );
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document.write( "In this case it would be easier and more simple to solve for x first, <BR>\n" );
document.write( "multiply the first equation by 4, then subtract the equations to form a single linear equation\r<BR>\n" );
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document.write( "12X+4Y=7.00<BR>\n" );
document.write( "2x+4Y=2.00<BR>\n" );
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document.write( "10X=5\r<BR>\n" );
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document.write( "divide out 10 to isolate x\r<BR>\n" );
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document.write( "X=0.50\r<BR>\n" );
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document.write( "substitute x into the first equation to solve for y,\r<BR>\n" );
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document.write( "3(.50)+Y=1.75<BR>\n" );
document.write( "1.50+y=1.75<BR>\n" );
document.write( "Y=.25\r<BR>\n" );
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document.write( "So a chocolate bar costs $0.50 and a pack of gum is $0.25 </SPAN>\n" );
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