document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1116274>Question 1116274</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Jonathon invested $8,400, part at 12 percent annual interest and the remainder at 8 percent annual interest. In one year, he earned three times as much interest from the 12 percent investment as he did from the 8 percent investment. How much interest did Jonathon earn at 8 percent interest?\r<BR>\n" );
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document.write( "The answer should be $224. How did I achieve that answer What formula should be used and where should the percentages go into the formula? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #731146 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13200)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=731146\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "(1) Divide the $8400 that was invested into two parts, one to be invested at 12% and the other at 8%.<br><BR>\n" );
document.write( "let x = amount invested at 8%<BR>\n" );
document.write( "then (8400-x) = amount invested at 12%<br><BR>\n" );
document.write( "(2) Write and solve the equation that says the interest on the amount invested at 12% was 3 times the interest on the amount invested at 8%.<br><BR>\n" );
document.write( "interest at 12%: 0.12 times (8400-x)<BR>\n" );
document.write( "interest at 8%: 0.08 times x<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.12%288400-x%29+=+3%2A0.08%28x%29 ALIGN=MIDDLE  ALT=\"0.12%288400-x%29+=+3%2A0.08%28x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "I'll let you finish from there. </SPAN>\n" );
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