document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=466849>Question 466849</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hello,<BR>\n" );
document.write( "I have a question I need help with. Your time is appreciated.<BR>\n" );
document.write( "A college student earned $5500 during summer vacation working as a waiter in a popular restaurant. The student invested part of the money at 9% and the rest at 7%. If the student received a total of $429 in interest at the end of the year, how much was invested at 9%?<BR>\n" );
document.write( "Thank you </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #320195 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=320195\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A college student earned $5500 during summer vacation working as a waiter in a popular restaurant.<BR>\n" );
document.write( "The student invested part of the money at 9% and the rest at 7%. <BR>\n" );
document.write( "If the student received a total of $429 in interest at the end of the year, how much was invested at 9%?<BR>\n" );
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document.write( "Using 2 variables you get 2 equations:<BR>\n" );
document.write( "n + s = 5500 dollars<BR>\n" );
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document.write( "0.09n + 0.07s = 429 dollars<BR>\n" );
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document.write( "Multiply thru the 1st equation by 7<BR>\n" );
document.write( "Multiply thru the 2nd equation by 100<BR>\n" );
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document.write( "7n + 7s = 7*5500<BR>\n" );
document.write( "9n + 7s = 42900<BR>\n" );
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document.write( "Subtract and solve for \"n\":<BR>\n" );
document.write( "2n = 4400<BR>\n" );
document.write( "n = $2200 (amt invested at 9%)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "============\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );