document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=69843>Question 69843</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Angus invested $18,000, part at 3% and part at 5%.  If the total interest at the end of the year is $660, how much did he 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 #49766 by </B><A HREF=/tutors/aboutme.mpl?userid=tutorcecilia><B>tutorcecilia(2152)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=tutorcecilia><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=tutorcecilia><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=49766\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> $x+$y=$18,000<BR>\n" );
document.write( "or x+(18,000-x)=18,000<BR>\n" );
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document.write( ".03x+.05(18,000-x)=660 because:<BR>\n" );
document.write( "$x invested at 3% + $y invested at 5%=A total of $660 in interest.\r<BR>\n" );
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document.write( "Simplify<BR>\n" );
document.write( ".03x+.05(18,000-x)=660 <BR>\n" );
document.write( ".03x+900-.05x=660<BR>\n" );
document.write( ".03x+900-900-.05x=660-900<BR>\n" );
document.write( ".03x-.05x=-240<BR>\n" );
document.write( "-.02=-240<BR>\n" );
document.write( "-.02x/-.02=-240/-.02<BR>\n" );
document.write( "x=12,000 <BR>\n" );
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document.write( "Plugging x=$12,000 back into the original equation:<BR>\n" );
document.write( ".03x+.05(18,000-x)=660 <BR>\n" );
document.write( ".03(12,000)+.05(18,000-12,000)=660<BR>\n" );
document.write( "360+ .05(6,000)=660<BR>\n" );
document.write( "360+300=660<BR>\n" );
document.write( "660=660 checks out </SPAN>\n" );
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