document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=106663>Question 106663</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Bob invested $21,000, part at 18% and part at 8%.  If the total interest at the end of the year is $1,980, how much did he invest at 18%? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #77675 by </B><A HREF=/tutors/aboutme.mpl?userid=elima><B>elima(1433)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=elima><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=77675\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Bob invested $21,000, part at 18% and part at 8%.  If the total interest at the end of the year is $1,980, how much did he invest at 18%?<BR>\n" );
document.write( "x+y=21000<BR>\n" );
document.write( ".18x+.08y=1980<BR>\n" );
document.write( "------------------------<BR>\n" );
document.write( "x=21000-y<BR>\n" );
document.write( ".18(21000-y)+.08y=1980<BR>\n" );
document.write( "3780-.18y+.08y=1980<BR>\n" );
document.write( "-.1y=-1800<BR>\n" );
document.write( "y=18000<BR>\n" );
document.write( "------------<BR>\n" );
document.write( "x+18000=21000<BR>\n" );
document.write( "x=3000<BR>\n" );
document.write( "------------------<BR>\n" );
document.write( "so he invested $3000 at 18%<BR>\n" );
document.write( ":) </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );