document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=211047>Question 211047</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A sum of $2100 is invested in two accounts, one earning 7% simple annual interest and one earning 4%. If the total interest earned for the year is $120, how much money is in each account? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #159473 by </B><A HREF=/tutors/aboutme.mpl?userid=math+problem+solving><B>math problem solving(30)</B></A><img src=\"/images/stars/stars-07.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=math+problem+solving><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=159473\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let x be the amount of money invested at 7%. <BR>\n" );
document.write( "Then the amount invested at 4% is 2100 - x.\r<BR>\n" );
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document.write( "The interest earned from the money invested at 7% is x*7%<BR>\n" );
document.write( "The interest earned from the money invested at 4% is (2100 - x)*4%\r<BR>\n" );
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document.write( "As the total interest earned from the two investments is given as $120, we have:<BR>\n" );
document.write( "x*7% + (2100 - x)*4% = 120\r<BR>\n" );
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document.write( "Solving for x, we get<BR>\n" );
document.write( "7x + 4(2100 - x) = 12000  (multiply both sides by 100)<BR>\n" );
document.write( "7x + 8400 - 4x = 12000<BR>\n" );
document.write( "3x + 8400 = 12000<BR>\n" );
document.write( "3x = 3600<BR>\n" );
document.write( "x = 1200\r<BR>\n" );
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document.write( "So $1200 is invested at 7%, and $2100 - $1200 = $900 is invested at 4%.<BR>\n" );
document.write( "  </SPAN>\n" );
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