document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=974996>Question 974996</A>: <I><SPAN STYLE=\"word-break: break-all;\"> two acid solutions are available. One has a concentration of 20% acid and another that is 45% acid. How much of each acid must be mixed to obtain a 9L acid solution of 30% concentration? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #596820 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=596820\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  two acid solutions are available. One has a concentration of 20% acid and another that is 45% acid. How much of each acid must be mixed to obtain a 9L acid solution of 30% concentration?<BR>\n" );
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document.write( "Equation::<BR>\n" );
document.write( "acid + acid = acid<BR>\n" );
document.write( "0.20x + 0.45(9-x) = 0.30*9<BR>\n" );
document.write( "-------<BR>\n" );
document.write( "20x + 45*9 - 45x = 30*9<BR>\n" );
document.write( "-25x = -15*9<BR>\n" );
document.write( "x = (3/5)9<BR>\n" );
document.write( "x = 27/5<BR>\n" );
document.write( "x = 5.4L (amt. of 20% solution needed)<BR>\n" );
document.write( "9-x = 3.6L (amt. of 45% solution needed)<BR>\n" );
document.write( "--------------<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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document.write( "</TD></TR></TABLE>\n" );