document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=193629>Question 193629</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A tank contains 20 gallons of a 30% antifreeze solution.  How many gallons of an 80% antifreeze solution shoul be added to the tank in order to have the concentration of the antifreeze in the tank increase 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 #145462 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=145462\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .30*20+.80x=.5(20+x)<BR>\n" );
document.write( "6+.8x=10+.5x<BR>\n" );
document.write( ".8x-.5x=10-6<BR>\n" );
document.write( ".3x=4<BR>\n" );
document.write( "x=13.33 gal of 80% solution is needed.<BR>\n" );
document.write( "Proof:<BR>\n" );
document.write( ".30*20+.8*13.33=.5(20+13.33)<BR>\n" );
document.write( "6+10.66=.5*33.33<BR>\n" );
document.write( "16.66=16.66<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );