document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=274183>Question 274183</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If you made an extra $9,000. You invested part of the money at 10% and the rest at 8%. You make a total of $840 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 #200148 by </B><A HREF=/tutors/aboutme.mpl?userid=fractalier><B>fractalier(6550)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=fractalier><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=fractalier><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=200148\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let x be how much you invest at 8%.<BR>\n" );
document.write( "Then 9000 - x is how much you invest at 10%.<BR>\n" );
document.write( "Here's the setup...<BR>\n" );
document.write( "(.08)x + (.10)(9000 - x) = 840<BR>\n" );
document.write( "Multiply by 100 to clear decimals and get<BR>\n" );
document.write( "8x + 10(9000 - x) = 84000<BR>\n" );
document.write( "8x + 90000 - 10x = 84000<BR>\n" );
document.write( "-2x + 90000 = 84000<BR>\n" );
document.write( "-2x = -6000<BR>\n" );
document.write( "x = 3000<BR>\n" );
document.write( "Thus $3000 was invested at 8%. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );