document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=500158>Question 500158</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A dehydrated patient needs a 6.8% saline IV. Unfortunately, the hospital only has bags of 4% and 7% saline solutions. How many liters of each of these solutions should be mixed together to yield 3 liters of the desired concentration?\r<BR>\n" );
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document.write( "x=4% saline solutions<BR>\n" );
document.write( "y=7% saline solutions \r<BR>\n" );
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document.write( "x+y=3<BR>\n" );
document.write( ".04x+.07y=.068<BR>\n" );
document.write( "x=3-y<BR>\n" );
document.write( ".04(3-y)+.07y=.068<BR>\n" );
document.write( ".12-.04y+.07y=.068<BR>\n" );
document.write( ".03y=-.052<BR>\n" );
document.write( "y=-1.73<BR>\n" );
document.write( "x+-1.73=3<BR>\n" );
document.write( "x=4.73<BR>\n" );
document.write( "4.73+-1.73=3<BR>\n" );
document.write( "3=3<BR>\n" );
document.write( ".04(4.73)+.07(-1.73)=.068<BR>\n" );
document.write( ".189-.121=.068<BR>\n" );
document.write( ".068=.068 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #338022 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16949)</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=338022\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> percent	percent	----------------			quantity								<BR>\n" );
document.write( "Saline I	4	----------------			x	liters							<BR>\n" );
document.write( "Saline II	7	----------------	3	-	x	liters							<BR>\n" );
document.write( "Mixture	6.80%	----------------	3										<BR>\n" );
document.write( "													<BR>\n" );
document.write( "4x+7(3-x)=6.8*	3	<BR>\n" );
document.write( "													<BR>\n" );
document.write( "4x+21-7x=20.4			<BR>\n" );
document.write( "4x-7x=	20.4	-	21			<BR>\n" );
document.write( "-3x=	-0.6							<BR>\n" );
document.write( "/	-3												<BR>\n" );
document.write( "	x=0.2	liters	4.00%		Saline I	<BR>\n" );
document.write( "	2.8	liters 	7.00%		Saline II	<BR>\n" );
document.write( " </SPAN>\n" );
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