document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=934396>Question 934396</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Wallt has three investments totaling $120,000. These investments earn interest at 4%, 6%, and 8% respectively. Walt's total income from these investments is $7,600. The income from the 8% investment exceeds the total income from the other two investments by $400. Find out how much Walt has invested at 6% </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #567415 by </B><A HREF=/tutors/aboutme.mpl?userid=TimothyLamb><B>TimothyLamb(4379)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=TimothyLamb><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=TimothyLamb><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=567415\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x = amount invested at 4%<BR>\n" );
document.write( "y = amount invested at 6%<BR>\n" );
document.write( "z = amount invested at 8%<BR>\n" );
document.write( "---<BR>\n" );
document.write( "x + y + z = 120000<BR>\n" );
document.write( "0.04x + 0.06y + 0.08z = 7600<BR>\n" );
document.write( "0.08z = 0.04x + 0.06y + 400<BR>\n" );
document.write( "---<BR>\n" );
document.write( "put the system of linear equations into standard form<BR>\n" );
document.write( "---<BR>\n" );
document.write( "x + y + z = 120000<BR>\n" );
document.write( "0.04x + 0.06y + 0.08z = 7600<BR>\n" );
document.write( "0.04x + 0.06y - 0.08z = -400<BR>\n" );
document.write( "---<BR>\n" );
document.write( "copy and paste the above standard form linear equations in to this solver:<BR>\n" );
document.write( "https://sooeet.com/math/system-of-linear-equations-solver.php<BR>\n" );
document.write( "---<BR>\n" );
document.write( "solution:<BR>\n" );
document.write( "x = amount invested at 4% = 30000<BR>\n" );
document.write( "y = amount invested at 6% = 40000<BR>\n" );
document.write( "z = amount invested at 8% = 50000<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Solve and graph linear equations:<BR>\n" );
document.write( "https://sooeet.com/math/linear-equation-solver.php<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Solve quadratic equations with quadratic formula:<BR>\n" );
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document.write( "---<BR>\n" );
document.write( "Solve systems of linear equations up to 6-equations 6-variables:<BR>\n" );
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document.write( "---<BR>\n" );
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document.write( "</TD></TR></TABLE>\n" );