document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=25707>Question 25707</A>: <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 #13822 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=13822\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let x = the amount invested at 9%<BR>\n" );
document.write( "Since the total amount invested was $9000, the amount invested at 8%<BR>\n" );
document.write( "can be expressed as (9000 - x)<BR>\n" );
document.write( "the interest received from the 9% investment is<BR>\n" );
document.write( ".09x<BR>\n" );
document.write( "the interest received from the 8% investment is<BR>\n" );
document.write( ".08(9000 - x)<BR>\n" );
document.write( "If you add these two interest incomes together, you get the toal interest<BR>\n" );
document.write( "that Walt made, so<BR>\n" );
document.write( ".09x + .08(9000 - x) = 770<BR>\n" );
document.write( ".09x + 720 - .08x = 770<BR>\n" );
document.write( ".01x = 50<BR>\n" );
document.write( "x = 5000<BR>\n" );
document.write( "this is the amount invested at 9%<BR>\n" );
document.write( "(9000 - 5000)= 4000 is the amount invested at 8% </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );