document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=907674>Question 907674</A>: <I><SPAN STYLE=\"word-break: break-all;\"> John had $30,000. He invested part of his money in bonds paying 12% annual simple interest and the rest into a savings account giving 4% annual interest. At the end of the year he received $2,400 as extra income. How much did John place in each investment?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #550484 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=550484\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Bonds	12.00%		per annum	-------------	Amount invested =x		<BR>\n" );
document.write( "Savings	4.00%		per annum	------------	Amount invested = y		<BR>\n" );
document.write( "	20000						<BR>\n" );
document.write( "Interest-----	740.00						<BR>\n" );
document.write( "							<BR>\n" );
document.write( "Bonds	12.00%		per annum	---x			<BR>\n" );
document.write( "Savings	4.00%		per annum	---y			<BR>\n" );
document.write( "Total investment							<BR>\n" );
document.write( "x	+	1	y=	20000	-------------1		<BR>\n" );
document.write( "Interest on both investments							<BR>\n" );
document.write( "12.00%	x	+	4.00%	y=	740		<BR>\n" );
document.write( "Multiply by		100					<BR>\n" );
document.write( "12	x	+	4	y=	74000.00	--------2	<BR>\n" );
document.write( "Multiply (1) by			-12				<BR>\n" );
document.write( "we get							<BR>\n" );
document.write( "-12	x	-12	y=	-240000.00			<BR>\n" );
document.write( "Add this to (2)							<BR>\n" );
document.write( "0	x	-8	y=	-166000			<BR>\n" );
document.write( "divide by		-8					<BR>\n" );
document.write( "			y	=	20750		<BR>\n" );
document.write( "Bonds	12.00%	$	-750				<BR>\n" );
document.write( "Savings	4.00%	$	20750				<BR>\n" );
document.write( "							<BR>\n" );
document.write( "CHECK							<BR>\n" );
document.write( "-750	---------	12.00%	-------	-90.00			<BR>\n" );
document.write( "20750	-------------	4.00%	-------	830.00			<BR>\n" );
document.write( "Total			--------------------	740.00			<BR>\n" );
document.write( "							<BR>\n" );
document.write( "m.ananth@hotmail.ca							<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );