document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1103656>Question 1103656</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Debra's Coffee Shop makes a blend that is a mixture of two types of coffee. Type A coffee costs Debra <BR>\n" );
document.write( "$4.15<BR>\n" );
document.write( " per pound, and type B coffee costs <BR>\n" );
document.write( "$5.70<BR>\n" );
document.write( " per pound. This month, Debra made <BR>\n" );
document.write( "144<BR>\n" );
document.write( " pounds of the blend, for a total cost of <BR>\n" );
document.write( "$734.00<BR>\n" );
document.write( ". How many pounds of type B coffee did she use?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #718355 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=718355\">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;\" > = pounds of type A 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;\" > = pounds of type B needed<BR>\n" );
document.write( "---------------------------------------<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+a+%2B+b+=+144+ ALIGN=MIDDLE  ALT=\"+a+%2B+b+=+144+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+4.15a+%2B+5.7b+=+734+ ALIGN=MIDDLE  ALT=\"+4.15a+%2B+5.7b+=+734+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "--------------------------------<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+415a+%2B+570b+=+73400+ ALIGN=MIDDLE  ALT=\"+415a+%2B+570b+=+73400+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Multiply both sides of (1) by <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+415+ ALIGN=MIDDLE  ALT=\"+415+\"   DISABLED_style= \"max-width:90%; height:auto;\" > and<BR>\n" );
document.write( "and subtract (1) from (2)<BR>\n" );
document.write( "--------------------------------<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+415a+%2B+570b+=+73400+ ALIGN=MIDDLE  ALT=\"+415a+%2B+570b+=+73400+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+-415a+-+415b+=+-59760+ ALIGN=MIDDLE  ALT=\"+-415a+-+415b+=+-59760+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "--------------------------------<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+155b+=+13640+ ALIGN=MIDDLE  ALT=\"+155b+=+13640+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+b+=+88+ ALIGN=MIDDLE  ALT=\"+b+=+88+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "and<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+a+%2B+b+=+144+ ALIGN=MIDDLE  ALT=\"+a+%2B+b+=+144+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+a+%2B+88+=+144+ ALIGN=MIDDLE  ALT=\"+a+%2B+88+=+144+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+a+=+56+ ALIGN=MIDDLE  ALT=\"+a+=+56+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "-----------------------<BR>\n" );
document.write( "she needs 88 pounds of type B coffee<BR>\n" );
document.write( "-----------------------------------<BR>\n" );
document.write( "check:<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+4.15a+%2B+5.7b+=+734+ ALIGN=MIDDLE  ALT=\"+4.15a+%2B+5.7b+=+734+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+4.15%2A56+%2B+5.7%2A88+=+734+ ALIGN=MIDDLE  ALT=\"+4.15%2A56+%2B+5.7%2A88+=+734+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+232.4+%2B+501.6+=+734+ ALIGN=MIDDLE  ALT=\"+232.4+%2B+501.6+=+734+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+734+=+734+ ALIGN=MIDDLE  ALT=\"+734+=+734+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "OK\r<BR>\n" );
document.write( "\n" );
document.write( " <BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );