document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=200265>Question 200265</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hi!\r<BR>\n" );
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document.write( "A biologist has two brine solutions, one containing 1% salt and another containing 4% salt. How many milliliters of each solution should he mix to obtain 1 L of a solution that contains 2.8% salt?\r<BR>\n" );
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document.write( "thanks for the homework help!\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #150635 by </B><A HREF=/tutors/aboutme.mpl?userid=MathTherapy><B>MathTherapy(10552)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathTherapy><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=MathTherapy><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=150635\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Since the 2 solutions must add to 1 liter, then they must add to 1,000 ml\r<BR>\n" );
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document.write( "Let the amount of 1% salt solution in the 2.8% salt solution be x. <BR>\n" );
document.write( "Then the amount of 4% solution in the 2.8% salt solution is 1,000 – x\r<BR>\n" );
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document.write( "Therefore, we get:  .01(x) + .04(1,000 – x) = .028(1,000)\r<BR>\n" );
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document.write( "This equation becomes:  .01x + 40 - .04x = 28\r<BR>\n" );
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document.write( "-.03x  +  40  =  28<BR>\n" );
document.write( "-.03x   =   - 12<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x++=++%28-12%29%2F%28-.03%29 ALIGN=MIDDLE  ALT=\"x++=++%28-12%29%2F%28-.03%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 400\r<BR>\n" );
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document.write( "Therefore, he needs to mix 400 ML of the 1% salt solution, and 600 (1,000 – 400) ML of the 4% salt solution to get 1,000 ML, or 1 Liter of 2.8% salt solution.<BR>\n" );
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