document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=160766>Question 160766</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I invested $18,000.  Part of it was invested at 3% annual simple interst and the rest was invested at 4%.  I earned $650 in interest for the year.  How much did I invest 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 #118517 by </B><A HREF=/tutors/aboutme.mpl?userid=KnightOwlTutor><B>KnightOwlTutor(293)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=KnightOwlTutor><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=KnightOwlTutor><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=118517\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Amount invested at 3%=x<BR>\n" );
document.write( "Amount invested at 4%=18,000-x\r<BR>\n" );
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document.write( "Convert % into decimal format 3%=.03 4%=.04<BR>\n" );
document.write( "The equation is as follows\r<BR>\n" );
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document.write( ".03x+.04(18,000-x)=$650\r<BR>\n" );
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document.write( "Use the distributive property\r<BR>\n" );
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document.write( ".03+720-.04x=650\r<BR>\n" );
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document.write( "Subtract 720 from both sides\r<BR>\n" );
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document.write( "add the two x terms\r<BR>\n" );
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document.write( "-.01x=-70\r<BR>\n" );
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document.write( "Divide both terms by -.01\r<BR>\n" );
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document.write( "x=$7000 invested at 3%\r<BR>\n" );
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document.write( "$18,000-$7,000=$11,000 invested at 4%\r<BR>\n" );
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document.write( "Let's double check our answer by calculating the interest generated by each portion and determining whether this amount equals the amount designated in the problem.\r<BR>\n" );
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document.write( ".03(7000)+.04(11000)=210+440=650\r<BR>\n" );
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document.write( "650=650\r<BR>\n" );
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document.write( " </SPAN>\n" );
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