document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=177097>Question 177097</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/9780321501080/algebrahomeworkh></A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> Mike invested $6000 for one year. He invested part of it at 9% and the rest at 11%. At the end of the year he earned $624 in interest. 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 #132153 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=132153\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Mike invested $6000 for one year. He invested part of it at 9% and the rest at 11%. At the end of the year he earned $624 in interest. How much did he invest at each rate?<BR>\n" );
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document.write( "Equation:<BR>\n" );
document.write( "interest + interest = interest<BR>\n" );
document.write( "0.09x + 0.11(6000-x) = 624\r<BR>\n" );
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document.write( "9x + 11(6000-x) = 62400\r<BR>\n" );
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document.write( "9x + 66000 - 9x = 62400<BR>\n" );
document.write( "-2x = - 3600<BR>\n" );
document.write( "x = $1800 (amt. invested at 9%)<BR>\n" );
document.write( "6000-x = $4200 (amt. invested at 11%)<BR>\n" );
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document.write( "Cheers<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );