document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=911502>Question 911502</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If one solution is 20% acid and another 50% acid, then how many liters of each must be mixed to get 20 liters of solution that is 40% acid? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #553121 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=553121\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> We need a total of 20 liter at 40%<BR>\n" );
document.write( "We want to know how many liter at 20% to mix with 50%<BR>\n" );
document.write( "a+b=20,<BR>\n" );
document.write( "0.2*a+0.5*b=0.4*20<BR>\n" );
document.write( "a=20-b<BR>\n" );
document.write( "0.2*(20-b)+0.5*b=8<BR>\n" );
document.write( "4-0.2b+0.5*b=8<BR>\n" );
document.write( "0.3*b=4<BR>\n" );
document.write( "b=13.3333333<BR>\n" );
document.write( "a=20-b<BR>\n" );
document.write( "a=6.66666667 liter at 20%<BR>\n" );
document.write( "b=13.3333333 liter at 50%<BR>\n" );
document.write( "check<BR>\n" );
document.write( "0.2*6.66666667+0.5*13.3333333=0.4*20<BR>\n" );
document.write( "1.33333333+6.66666667=8<BR>\n" );
document.write( "8.0=8<BR>\n" );
document.write( "ok<BR>\n" );
document.write( "codemx1<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );