document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=697573>Question 697573</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Mark invested $4000 at simple annual interest, some at 5% and the rest at 8%. If he received $272 in interest for one year, how much did he invest at each rate?\r<BR>\n" );
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document.write( "I have absolutely no idea how to do this problem. Can anyone help me? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #430101 by </B><A HREF=/tutors/aboutme.mpl?userid=lynnlo><B>lynnlo(4176)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lynnlo><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=430101\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x=amount invested at 5%<BR>\n" );
document.write( "y-------------------8%<BR>\n" );
document.write( "x+y=$4000<BR>\n" );
document.write( ".05*x+.08y=272<BR>\n" );
document.write( "x=$4000-y<BR>\n" );
document.write( ".05(4000-y)+.08y=272<BR>\n" );
document.write( "200-.05y+.08y=272<BR>\n" );
document.write( "0.03y=72<BR>\n" );
document.write( "y=2400<BR>\n" );
document.write( "y=2400,,,,,x=1600<BR>\n" );
document.write( "$1600 at 5%<BR>\n" );
document.write( "$2400 at 8% </SPAN>\n" );
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