document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=248121>Question 248121</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Walt made an extra $5000 last year from a part-time job. He invested part of the money at 6% and the rest at 10%. He made a total of $420 in interest. How much was invested at 10%? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #180853 by </B><A HREF=/tutors/aboutme.mpl?userid=tutorcecilia><B>tutorcecilia(2152)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=tutorcecilia><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=tutorcecilia><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=180853\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Walt made an extra $5000 last year from a part-time job. He invested part of the money at 6% and the rest at 10%. He made a total of $420 in interest. How much was invested at 10%?\r<BR>\n" );
document.write( "\n" );
document.write( "Use: x+y=c<BR>\n" );
document.write( "So, x+y=5000<BR>\n" );
document.write( "y=50000-x<BR>\n" );
document.write( "and <BR>\n" );
document.write( "Use: ax+by=total<BR>\n" );
document.write( "So, .06x+.10y=420<BR>\n" );
document.write( ".06x+.10(5000-x)=420 [substitute y=5000-x)<BR>\n" );
document.write( ".06x+500-.10x=420<BR>\n" );
document.write( ".06x-.10x=420-500<BR>\n" );
document.write( "-.04x=-80<BR>\n" );
document.write( "-0.4x/.04=-80/-.04<BR>\n" );
document.write( "x=2000<BR>\n" );
document.write( "Substituting: 2000+y=5000<BR>\n" );
document.write( "y=3000<BR>\n" );
document.write( "answer: y=$3000<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );