document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=739875>Question 739875</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Ivan had $10,000 to invest.  He invested some in an account that paid 7% simple interest per year and some in an account that paid 5% simple interest per year.  After 1 year he received a total of $680 in interest.  How much did he invest in each account?\r<BR>\n" );
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document.write( "(I tried to set up a table, but all I know is the amount of time, the total principal and the total interest.  I can't figure out what variables to use or where to place them to form an equation to solve. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #451413 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=451413\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Part I	5.00%		per annum	-------------	Amount invested =x		<BR>\n" );
document.write( "Part II	7.00%		per annum	------------	Amount invested = y		<BR>\n" );
document.write( "	10000						<BR>\n" );
document.write( "Interest-----	680.00						<BR>\n" );
document.write( "							<BR>\n" );
document.write( "Part I	5.00%		per annum	---x			<BR>\n" );
document.write( "Part II	7.00%		per annum	---y			<BR>\n" );
document.write( "Total investment							<BR>\n" );
document.write( "x	+	1	y=	10000	-------------1		<BR>\n" );
document.write( "Interest on both investments							<BR>\n" );
document.write( "5.00%	x	+	7.00%	y=	680		<BR>\n" );
document.write( "Multiply by		100					<BR>\n" );
document.write( "5	x	+	7	y=	68000.00	--------2	<BR>\n" );
document.write( "Multiply (1) by			-5				<BR>\n" );
document.write( "we get							<BR>\n" );
document.write( "-5	x	-5	y=	-50000.00			<BR>\n" );
document.write( "Add this to (2)							<BR>\n" );
document.write( "0	x	2	y=	18000			<BR>\n" );
document.write( "divide by		2					<BR>\n" );
document.write( "			y	=	9000		<BR>\n" );
document.write( "Part I	5.00%	$	1000				<BR>\n" );
document.write( "Part II	7.00%	$	9000				<BR>\n" );
document.write( "							<BR>\n" );
document.write( "CHECK							<BR>\n" );
document.write( "1000	---------	5.00%	-------	50.00			<BR>\n" );
document.write( "9000	-------------	7.00%	-------	630.00			<BR>\n" );
document.write( "Total			--------------------	680.00			<BR>\n" );
document.write( "							<BR>\n" );
document.write( "m.ananth@hotmail.ca							<BR>\n" );
document.write( " </SPAN>\n" );
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