document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=216452>Question 216452</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How many liters of a 60% acid solution must be mixed with a 75% acid solution to get 20L of a 72% solution? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #163438 by </B><A HREF=/tutors/aboutme.mpl?userid=nerdybill><B>nerdybill(7384)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nerdybill><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=nerdybill><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=163438\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">     How many liters of a 60% acid solution must be mixed with a 75% acid solution to get 20L of a 72% solution?<BR>\n" );
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document.write( "Let x = liters of 60% acid solution to be added<BR>\n" );
document.write( "then<BR>\n" );
document.write( "20-x = liters of 75% acid solution to be added<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Our equation:<BR>\n" );
document.write( ".60x + .75(20-x) = .72(20)<BR>\n" );
document.write( ".60x + 15 - .75x = 14.4<BR>\n" );
document.write( "15 - .15x = 14.4<BR>\n" );
document.write( "- .15x = -.6<BR>\n" );
document.write( "x = 4 L (60% solution)<BR>\n" );
document.write( ".<BR>\n" );
document.write( "75% solution:<BR>\n" );
document.write( "20-x = 20-4 = 16 L </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );