document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=908306>Question 908306</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How many litres of 70% alcohol needs to be added to 50litres of 40% alcohol to make a 50% solution.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #551082 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=551082\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> We have 50 liter of 40% alcohol<BR>\n" );
document.write( "We want to add some 70% alcohol to make   50% alcohol<BR>\n" );
document.write( "0.7*x+0.4*50=0.5(50+x)<BR>\n" );
document.write( "0.7*x+20=25+0.5x<BR>\n" );
document.write( "0.7x-0.5x=25-20<BR>\n" );
document.write( "0.2x=5<BR>\n" );
document.write( "x=25 liter at 70% (17.5) is added to 50 liter at 40%(20) to make 50% of 75 liter(37.5)<BR>\n" );
document.write( "check<BR>\n" );
document.write( "0.7*25+0.4*50=0.5(50+25)<BR>\n" );
document.write( "17.5+20=0.5(75)<BR>\n" );
document.write( "37.5=37.5<BR>\n" );
document.write( "ok\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );