document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=347300>Question 347300</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a chemist needs to mix 20L of a 40% acid solution with some 70% acid solution to obtain a mixture that is 50% acid. How many liters of the 70% acid solution should be used? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #248364 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley77><B>checkley77(12844)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley77><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=248364\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .70x+.40*20=.50(20+x)<BR>\n" );
document.write( ".70x+8=10+.50x<BR>\n" );
document.write( ".70x-.50x=10-8<BR>\n" );
document.write( ".20x=2<BR>\n" );
document.write( "x=2/.2<BR>\n" );
document.write( "x=10 L of 70% acid is used.<BR>\n" );
document.write( "Proof:<BR>\n" );
document.write( ".70*10+.40*.2=.50(20=10)<BR>\n" );
document.write( "7+8=.5*30<BR>\n" );
document.write( "15=15<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );