document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=78777>Question 78777</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A computer store received 2 shipments of software. The 1st shipment contained 12 word processing programs and 10 financial programs with a total value of $6520. The 2nd shipment, valued at $3940, contained 6 word processing programs and 7 financial programs. Find the cost of each program? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #56517 by </B><A HREF=/tutors/aboutme.mpl?userid=tutor_paul><B>tutor_paul(519)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=tutor_paul><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=tutor_paul><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=56517\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> This problem can be boiled down to having 2 equations with 2 unknowns. If you have  as many equations as unknowns, you can always find the unknowns!<BR>\n" );
document.write( "Let w=Word Processing Program<BR>\n" );
document.write( "Let f=Financial Program<BR>\n" );
document.write( "From the first statement, you can write the following equation:<BR>\n" );
document.write( "Equation #1: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=12w%2B10f=6520 ALIGN=MIDDLE  ALT=\"12w%2B10f=6520\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "From the second statement, you can write the following equation:<BR>\n" );
document.write( "Equation #2:<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=6w%2B7f=3940 ALIGN=MIDDLE  ALT=\"6w%2B7f=3940\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Now solve for w in terms of f in Equation #1:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=12w=6520-10f ALIGN=MIDDLE  ALT=\"12w=6520-10f\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=w=%28%286520-10f%29%2F12%29 ALIGN=MIDDLE  ALT=\"w=%28%286520-10f%29%2F12%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Now, you can take this equation for w, and substitute it into Equation #2:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=6%28%286520-10f%29%2F12%29%2B7f=3940 ALIGN=MIDDLE  ALT=\"6%28%286520-10f%29%2F12%29%2B7f=3940\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Now, solve for f:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28%286520-10f%29%2F2%29%2B7f=3940 ALIGN=MIDDLE  ALT=\"%28%286520-10f%29%2F2%29%2B7f=3940\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Simplify...<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3260-5f%2B7f=3940 ALIGN=MIDDLE  ALT=\"3260-5f%2B7f=3940\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2f=680 ALIGN=MIDDLE  ALT=\"2f=680\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=f=340 ALIGN=MIDDLE  ALT=\"f=340\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Now that you know f, you can plug that into Equation #1 and solve for w.<BR>\n" );
document.write( "I will leave that part to you :-)<BR>\n" );
document.write( "Good Luck,<BR>\n" );
document.write( "tutor_paul@yahoo.com </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );