document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=184451>Question 184451</A>: <I><SPAN STYLE=\"word-break: break-all;\"> You need a 40%saline solution for an experiment, but only have 25%  saline and 75% saline solutions. How much of each would you have to combine to create 50ml of 40% saline solution?   </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #138450 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=138450\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> You need a 40%saline solution for an experiment, but only have 25% saline and 75% saline solutions. How much of each would you have to combine to create 50ml of 40% saline solution? <BR>\n" );
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document.write( "Equation:<BR>\n" );
document.write( "salt + salt = salt<BR>\n" );
document.write( "0.25x + 0.75(50-x) = 0.40*50\r<BR>\n" );
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document.write( "Multiply thru by 100 to get:\r<BR>\n" );
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document.write( "25x + 75*50 - 75x = 40*50\r<BR>\n" );
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document.write( "-50x = -35*50\r<BR>\n" );
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document.write( "x = 35mL (amt. of 25% solution in the mixture)\r<BR>\n" );
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document.write( "50-x = 15mL (amt. of 75% solution in the mixture)<BR>\n" );
document.write( "======================================================<BR>\n" );
document.write( "Cheers<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );