document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=198242>Question 198242</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/9780495553458/algebrahomeworkh></A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> Walt made an extra $9000 last year from a part-time job. He invested part of the money at a 9% annual rate of interest, and the rest at an 8% annual rate of interest. At the end of the year, he made a total of $770 in interest. How much was invested at 8%? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #148763 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley77><B>checkley77(12844)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley77><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=148763\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .08x+.09(9,000-x)=770<BR>\n" );
document.write( ".08x+810-.09x=770<BR>\n" );
document.write( "-.01x=770-810<BR>\n" );
document.write( ".01x=-40<BR>\n" );
document.write( "x=-40/-.01<BR>\n" );
document.write( "x=$4,000 amount invested @ 8%.<BR>\n" );
document.write( "9,000-4,000=5,000 amount invested @ 9%.<BR>\n" );
document.write( "Proof:<BR>\n" );
document.write( ".08*4,000+.09*5,000=770<BR>\n" );
document.write( "320+450=770<BR>\n" );
document.write( "770=770 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );