document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=433575>Question 433575</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Each unit of grain A contains 2 grams of fat and 80 calories, and unit B has 3 grams of fat and 60 calories. If the final product is to provide 18 grams of fat and 480 calories, how much of each type of grain should be used. I think A is 3 and B is 4, but I don't know how to show it. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #300550 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=300550\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 	Unit A-------------	x 	Numbers					<BR>\n" );
document.write( "	Unit B	------------	y	Numbers					<BR>\n" );
document.write( "2x+3y=18	.............1		<BR>\n" );
document.write( "80x+60y=480.............2		<BR>\n" );
document.write( "Eliminate y									<BR>\n" );
document.write( "multiply (1)by 	-20							<BR>\n" );
document.write( "Multiply (2) by	1							<BR>\n" );
document.write( "-40x-60	y=-360			<BR>\n" );
document.write( "80x+60y=480			<BR>\n" );
document.write( "Add the two equations									<BR>\n" );
document.write( "40x=120			<BR>\n" );
document.write( "/40								<BR>\n" );
document.write( "x=3 Unit A			<BR>\n" );
document.write( "plug value of 			x	in (1)					<BR>\n" );
document.write( "2x+3y=18			<BR>\n" );
document.write( "6+3y=	18			<BR>\n" );
document.write( "3y=18-6	<BR>\n" );
document.write( "3y=12			<BR>\n" );
document.write( "y=4	Unit B<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );