document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=440728>Question 440728</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hello,\r<BR>\n" );
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document.write( "I need help on two problems using the substitution method;\r<BR>\n" );
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document.write( "The solution to the system of equation below is (8,4)\r<BR>\n" );
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document.write( "3x-5y<BR>\n" );
document.write( "7x + 3y = 68\r<BR>\n" );
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document.write( "The second problem is:<BR>\n" );
document.write( "Bill invested some money at 5% annual interest, and Jeanette invested some at 7%.  If their combined interest was $310 on a total investment of $5,000, how much did Bill invest?\r<BR>\n" );
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document.write( "Thanks in advance </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #304355 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=304355\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Bill	5.00%		per annum						<BR>\n" );
document.write( "Jeanette	7.00%		per annum						<BR>\n" );
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document.write( "x+y=5000	------------------------1				<BR>\n" );
document.write( "5.00%x+7.00%y=$310.00			<BR>\n" );
document.write( "Multiply by 	100							<BR>\n" );
document.write( "5x+7y=$31,000.00		--------2	<BR>\n" );
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document.write( "Multiply (1) by	-5						<BR>\n" );
document.write( "we get									<BR>\n" );
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document.write( "-5x-5y=	-25000.00			<BR>\n" );
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document.write( "Add this to (2)									<BR>\n" );
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document.write( "2y=$6,000.00			<BR>\n" );
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document.write( "divide by 2							<BR>\n" );
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document.write( "y= $3,000.00		investment at 	7.00%---- Jeanette<BR>\n" );
document.write( "Balance	$2,000.00	investment at 	5.00% --- Bill<BR>\n" );
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