document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=466811>Question 466811</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?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #320096 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=320096\">put this solution on YOUR website!</A><BR><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? <BR>\n" );
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document.write( "Equation:<BR>\n" );
document.write( "salt + salt = salt<BR>\n" );
document.write( "0.04x + 0.07(3-x) = 0.068*3<BR>\n" );
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document.write( "Multiply thru by 1000 and solve for \"x\":<BR>\n" );
document.write( "40x + 70*3 - 70x = 68*3<BR>\n" );
document.write( "2*3 = 30x<BR>\n" );
document.write( "x = 0.2 liters (amt. of 4% solution needed)<BR>\n" );
document.write( "---<BR>\n" );
document.write( "3-x = 2.8 liters (amt. of 7% solution needed)<BR>\n" );
document.write( "-------------------------------------------<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );