document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1025825>Question 1025825</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a lab tech needs to make a 126-liter batch of a 20% acid solution, how can the lab tech combine a batch od an acid solution that is oure acid with another that is 10% to get 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 #641145 by </B><A HREF=/tutors/aboutme.mpl?userid=FrankM><B>FrankM(1040)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=FrankM><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=FrankM><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=641145\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I prefer to teach this with the single variable method.\r<BR>\n" );
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document.write( "X is the amount of pure acid needed<BR>\n" );
document.write( "126-X is the 10% solution needed.\r<BR>\n" );
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document.write( "You see, this eliminates the need for 2 variables, since we know they add to 126, both amounts are expressed in terms of each other.\r<BR>\n" );
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document.write( "100X+10(126-X)=20(126)\r<BR>\n" );
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document.write( "100X+1260-10X=2520\r<BR>\n" );
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document.write( "90X=1260\r<BR>\n" );
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document.write( "X=14\r<BR>\n" );
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document.write( "14 liters pure acid<BR>\n" );
document.write( "112 liters 10% acid containing 11.2 liter acid.\r<BR>\n" );
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document.write( "total 25.2liters of acid in 126 liters solution is 25.2/126 = 20% </SPAN>\n" );
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