document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1200677>Question 1200677</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How much water must be evaporated from 180 L of 72% brine solution in order to increase the solution’s concentration by 8%?<BR>\n" );
document.write( "	A. 12 L<BR>\n" );
document.write( "	B. 16 L<BR>\n" );
document.write( "	C. 18 L<BR>\n" );
document.write( "	D. 20 L </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #835031 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13200)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=835031\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "We can ignore the fact that a salt concentration of 72% is not possible and treat the problem as a mathematical exercise.<br><BR>\n" );
document.write( "A couple of the other tutors have done that and shown algebraic solution methods.  Here is a different method.<br><BR>\n" );
document.write( "The increase of 8% in the concentration makes the new concentration 80%.  So 72% of the original 180 L is equal to 80% of the new total volume.<br><BR>\n" );
document.write( "Let x be the new volume; then<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=.72%28180%29=.80%28x%29 ALIGN=MIDDLE  ALT=\".72%28180%29=.80%28x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=%28.72%28180%29%29%2F.80=%289%2F10%29%28180%29=9%2A18=162 ALIGN=MIDDLE  ALT=\"x=%28.72%28180%29%29%2F.80=%289%2F10%29%28180%29=9%2A18=162\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "So the amount of water that must be evaporated is 180-162 = 18 L.<br><BR>\n" );
document.write( "ANSWER: 18 L<br><BR>\n" );
document.write( " </SPAN>\n" );
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