document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=108124>Question 108124</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Stan invested $17,000, part at 18% and part at 4%.  <BR>\n" );
document.write( "If the total interest at the end of the year is $1,380, how much did he invest at each<BR>\n" );
document.write( " rate?<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #78802 by </B><A HREF=/tutors/aboutme.mpl?userid=Fombitz><B>Fombitz(32388)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Fombitz><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=Fombitz><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=78802\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let's call the part he invested at 18%, E, and the part he invested at 4%, F.<BR>\n" );
document.write( "Then you know that,<BR>\n" );
document.write( "1.<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=E%2BF=17000 ALIGN=MIDDLE  ALT=\"E%2BF=17000\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "2.<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.18E%2B0.04F=1320 ALIGN=MIDDLE  ALT=\"0.18E%2B0.04F=1320\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Use 1. to solve for E in terms of F.<BR>\n" );
document.write( "1.<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=E%2BF=17000 ALIGN=MIDDLE  ALT=\"E%2BF=17000\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=E=17000-F ALIGN=MIDDLE  ALT=\"E=17000-F\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Now substitute that into equation 2 and solve for F.<BR>\n" );
document.write( "2.<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.18E%2B0.04F=1320 ALIGN=MIDDLE  ALT=\"0.18E%2B0.04F=1320\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.18%2817000-F%29%2B0.04F=1320 ALIGN=MIDDLE  ALT=\"0.18%2817000-F%29%2B0.04F=1320\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.18%2817000%29-0.18F%2B0.04F=1320 ALIGN=MIDDLE  ALT=\"0.18%2817000%29-0.18F%2B0.04F=1320\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3060-0.14F=1320 ALIGN=MIDDLE  ALT=\"3060-0.14F=1320\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-0.14F=1320-3060 ALIGN=MIDDLE  ALT=\"-0.14F=1320-3060\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-0.14F=-1740 ALIGN=MIDDLE  ALT=\"-0.14F=-1740\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=F=12428.57 ALIGN=MIDDLE  ALT=\"F=12428.57\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "From 1. <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=E=17000-F ALIGN=MIDDLE  ALT=\"E=17000-F\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=E=17000-12428.57 ALIGN=MIDDLE  ALT=\"E=17000-12428.57\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=E=4571.43 ALIGN=MIDDLE  ALT=\"E=4571.43\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Verify your answer using equation 2.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.18E%2B0.04F=1320 ALIGN=MIDDLE  ALT=\"0.18E%2B0.04F=1320\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.18%284571.43%29%2B0.04%2812427.57%29=1320 ALIGN=MIDDLE  ALT=\"0.18%284571.43%29%2B0.04%2812427.57%29=1320\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=822.86%2B497.10=1320 ALIGN=MIDDLE  ALT=\"822.86%2B497.10=1320\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1319.96=1320 ALIGN=MIDDLE  ALT=\"1319.96=1320\"   DISABLED_style= \"max-width:90%; height:auto;\" > Close enough, round off error.<BR>\n" );
document.write( "Good answer.<BR>\n" );
document.write( "$4571.43 at 18%, $12428.57 at 4%.  </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );