document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=677151>Question 677151</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I'm not sure if I have this right.  But, doing it as taught.\r<BR>\n" );
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document.write( "Mark invests $21,000 into two accounts with the simple interest rate of 4% and 6%.  If he wants to earn $1020 annual interest.  How much should he invest at each rate? \r<BR>\n" );
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document.write( "So far, I tabulated it and then came up with this equation and answer.\r<BR>\n" );
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document.write( "4%(x-21,000) + 6%(x) = 1020\r<BR>\n" );
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document.write( "I then multiplied times 10 to eliminate the percentages and then it looks like this.\r<BR>\n" );
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document.write( "4x - 84,000 + 6x = 10200\r<BR>\n" );
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document.write( "I combined like terms.\r<BR>\n" );
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document.write( "10x = 94200\r<BR>\n" );
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document.write( "Dividing by the coefficient, I got.\r<BR>\n" );
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document.write( "x = 9420\r<BR>\n" );
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document.write( "Then, I plugged x answer into x - 21,000 (9420 - 21,000 = 11580).\r<BR>\n" );
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document.write( "So, I believe my answer to be Mark must invest $9,420 at 6% and $11,580 at 4%.\r<BR>\n" );
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document.write( "Please be understanding of me, I'm painfully slow at this and I have no idea if I'm doing this right.  I have no confidence at this point and I may forget the set up when exam time comes.  \r<BR>\n" );
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document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #420710 by </B><A HREF=/tutors/aboutme.mpl?userid=ReadingBoosters><B>ReadingBoosters(3246)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ReadingBoosters><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=420710\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let's see...<BR>\n" );
document.write( "Establish variables<BR>\n" );
document.write( "x = $ at 4%<BR>\n" );
document.write( "y = $ at 6%<BR>\n" );
document.write( "...<BR>\n" );
document.write( "Given equation<BR>\n" );
document.write( "x+y = 21000<BR>\n" );
document.write( ".04x + .06y = 1020<BR>\n" );
document.write( "...<BR>\n" );
document.write( "Substitute<BR>\n" );
document.write( ".04(21000-y) + .06y = 1020<BR>\n" );
document.write( "840 - .04y + .06y = 1020<BR>\n" );
document.write( "840 + .02y = 1020<BR>\n" );
document.write( ".02y = 1020 - 840<BR>\n" );
document.write( ".02y = 180<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%28y+=+9000%29 ALIGN=MIDDLE  ALT=\"highlight_green%28y+=+9000%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > at 6%<BR>\n" );
document.write( "...<BR>\n" );
document.write( "x + 9000 = 21000<BR>\n" );
document.write( "x = 21000 - 9000 = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%28x=12000%29 ALIGN=MIDDLE  ALT=\"highlight_green%28x=12000%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > at 4%<BR>\n" );
document.write( "...<BR>\n" );
document.write( "Check<BR>\n" );
document.write( ".04(12000) + .06(9000) = 480+540 = 1020<BR>\n" );
document.write( ".....................<BR>\n" );
document.write( "Delighted to help.<BR>\n" );
document.write( "-Reading Boosters<BR>\n" );
document.write( "Website: www.MyHomeworkAnswers.com <BR>\n" );
document.write( "Wanting for others what we want for ourselves. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );