document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1098393>Question 1098393</A>: <I><SPAN STYLE=\"word-break: break-all;\"> You need a 65% alcohol solution. On hand, you have a 390 mL of a 10% alcohol mixture. You also have 95% alcohol mixture. How much of the 95% mixture will you need to add to obtain the desired solution?\r<BR>\n" );
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document.write( "You will need how much of <BR>\n" );
document.write( "of the 95% solution <BR>\n" );
document.write( " and how much of the desired 65% solution. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #712943 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=712943\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br>Again to tutor ikleyn...<br><BR>\n" );
document.write( "In response to another similar problem, you scolded tutor amalm06 for using a method that you did not understand, saying that students will not understand what they are doing if they use that method.<br><BR>\n" );
document.write( "Yet here in your response to this question, you say the way to start the problem is with the \"concentration\" equation.<br><BR>\n" );
document.write( "That might be where you would start, probably because of your background in science.  But to a beginning student, that is a \"magic\" formula, the basis of which is not clear.<br><BR>\n" );
document.write( "If you want to advocate using problem solving methods that are easy to understand, then starting working on this problem with a magic formula is not a good way to go.<br><BR>\n" );
document.write( "The standard algebraic approach to the problem is a much better place to start for beginning students. Tutor amalm06 posted a very neat and concise solution for this problem that requires far less work than your method.<br><BR>\n" );
document.write( "And, as I stated in my other recent comment to you, the method of alligation is the most efficient method for solving a problem like this, requiring far less work than the solution you show. </SPAN>\n" );
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