document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=312904>Question 312904</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A store mixes a Brazilian coffee worth worth $12 per kilogram and a Venezueluen coffee worth $16 per kilogram. The mixture is to sell for $13 per kilogram. Find out how much of each should be used to make a 384-kilogram mixture.\r<BR>\n" );
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document.write( "I honest to God have no idea how to even start </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #223717 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=223717\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a ALIGN=MIDDLE  ALT=\"a\"   DISABLED_style= \"max-width:90%; height:auto;\" > = kilograms of Brazilian coffee needed<BR>\n" );
document.write( "Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=b ALIGN=MIDDLE  ALT=\"b\"   DISABLED_style= \"max-width:90%; height:auto;\" > = kilograms of Venezuelan coffee needed<BR>\n" );
document.write( "---------------------<BR>\n" );
document.write( "given:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=12a ALIGN=MIDDLE  ALT=\"12a\"   DISABLED_style= \"max-width:90%; height:auto;\" > = cost of Brazilian coffee in mixture<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=16b ALIGN=MIDDLE  ALT=\"16b\"   DISABLED_style= \"max-width:90%; height:auto;\" > = cost of Venezuelan coffee in mixture<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=13%2A384 ALIGN=MIDDLE  ALT=\"13%2A384\"   DISABLED_style= \"max-width:90%; height:auto;\" > = cost of mixture<BR>\n" );
document.write( "---------------------<BR>\n" );
document.write( "Now I can rite these equations:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=12a+%2B+16b+=+13%2A384 ALIGN=MIDDLE  ALT=\"12a+%2B+16b+=+13%2A384\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=12a+%2B+16b+=+4992 ALIGN=MIDDLE  ALT=\"12a+%2B+16b+=+4992\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a+%2B+b+=+384 ALIGN=MIDDLE  ALT=\"a+%2B+b+=+384\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Multiply both sides of (2) by <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=12 ALIGN=MIDDLE  ALT=\"12\"   DISABLED_style= \"max-width:90%; height:auto;\" > and <BR>\n" );
document.write( "subtract from (1)<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=12a+%2B+16b+=+4992 ALIGN=MIDDLE  ALT=\"12a+%2B+16b+=+4992\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-12a+-+12b+=+4608 ALIGN=MIDDLE  ALT=\"-12a+-+12b+=+4608\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4b+=+384 ALIGN=MIDDLE  ALT=\"4b+=+384\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=b+=+96 ALIGN=MIDDLE  ALT=\"b+=+96\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "and, since<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a+%2B+b+=+384 ALIGN=MIDDLE  ALT=\"a+%2B+b+=+384\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a+=+384+-+96 ALIGN=MIDDLE  ALT=\"a+=+384+-+96\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a+=+288 ALIGN=MIDDLE  ALT=\"a+=+288\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "288 kg of Brazilian coffee and 96 kg of Venezuelan coffee are needed </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );