document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=809858>Question 809858</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A total of $7100 was invested as follows: a certain amount at 7%, twice that amount at 10%, and the remainder at 12%. If the annual interest from the three investments was $699, how much was invested at each rate? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #487810 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=487810\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A total of $7100 was invested .\r<BR>\n" );
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document.write( " a certain amount at 7%,-----------x<BR>\n" );
document.write( " twice that amount at 10%,----------2x<BR>\n" );
document.write( "the remainder at 12%. ---------------(7100-3x)<BR>\n" );
document.write( "annual interest from the three investments = $699\r<BR>\n" );
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document.write( "7%x+10%*2x+12%*(7100-3x)=699\r<BR>\n" );
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document.write( "multiply by 100<BR>\n" );
document.write( "7x+20x+12(7100-3x)=699\r<BR>\n" );
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document.write( "7x+20x+85200-36x=699\r<BR>\n" );
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document.write( "27x-36x=699-85200\r<BR>\n" );
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document.write( "-9x=-84501\r<BR>\n" );
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document.write( "/-9<BR>\n" );
document.write( "x=9389\r<BR>\n" );
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document.write( "amount at 7%,-----------$9389<BR>\n" );
document.write( " twice that amount at 10%,----------2x---------------$18778<BR>\n" );
document.write( "the remainder at 12%. --------------- Balance </SPAN>\n" );
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