document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=711055>Question 711055</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me solve the following:  a 12 liter antifreeze solution is made up of water and alcohol.  How much pure alcohol must be added to raise the concentration from 20% to 50%? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #437270 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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=437270\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Please help me solve the following: a 12 liter antifreeze solution is made up of water and alcohol. How much pure alcohol must be added to raise the concentration from 20% to 50%?<BR>\n" );
document.write( "**<BR>\n" );
document.write( "let x=amt of pure alcohol to add<BR>\n" );
document.write( "20%*12=2.4 liters (amt of pure alcohol in original solution)<BR>\n" );
document.write( "2.4/12=20%<BR>\n" );
document.write( "(2.4+x)/(12+x)=50%<BR>\n" );
document.write( "2.4+x=6+.5x<BR>\n" );
document.write( ".5x=3.6<BR>\n" );
document.write( "x=7.2<BR>\n" );
document.write( "amt of pure alcohol to add=7.2 liters </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );