document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=76851>Question 76851</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A certain sum of money is invested at 10%.  Twice that amount is invested at 8%.  The total amount of interest from both investments is $91.  How much is invested at 8%. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #55091 by </B><A HREF=/tutors/aboutme.mpl?userid=funmath><B>funmath(2933)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=funmath><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=55091\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A certain sum of money is invested at 10%.  Twice that amount is invested at 8%.  The total amount of interest from both investments is $91.  How much is invested at 8%.<BR>\n" );
document.write( "Let the amount invested at 10% be: x<BR>\n" );
document.write( "Then the amount invested at 8% is: 2x<BR>\n" );
document.write( "The formula for simple interest is: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28I=Prt%29 ALIGN=MIDDLE  ALT=\"highlight%28I=Prt%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > I=interest, P=amount invested(known also as Principal) r=interest rate and t=time in years<BR>\n" );
document.write( "Since they didn't give you time, I assume it is one year and can be ignored.<BR>\n" );
document.write( "rate=8/100=.08 for 8%<BR>\n" );
document.write( "rate=10/100=.10 for 10%<BR>\n" );
document.write( "I=91<BR>\n" );
document.write( "Problem to solve:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=91=.08%282x%29%2B.10%28x%29 ALIGN=MIDDLE  ALT=\"91=.08%282x%29%2B.10%28x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=91=.16x%2B.10x ALIGN=MIDDLE  ALT=\"91=.16x%2B.10x\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=91=.26x ALIGN=MIDDLE  ALT=\"91=.26x\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=91%2F.26=.26x%2F.26 ALIGN=MIDDLE  ALT=\"91%2F.26=.26x%2F.26\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=350=x ALIGN=MIDDLE  ALT=\"350=x\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "The amount invested at 10% is: x=$350<BR>\n" );
document.write( "The amount invested at 8% is 2x=2($350)=$700  <--that's what they asked for.<BR>\n" );
document.write( "Happy Calculating!!!!  </SPAN>\n" );
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