document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=335483>Question 335483</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How many gallons of pure alcohol should be mixed with 20 gallons of a 15% alcohol solution to obtain a mixture that is 25% alcohol </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #240441 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=240441\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> How many gallons of pure alcohol should be mixed with 20 gallons of a 15% alcohol solution to obtain a mixture that is 25% alcohol<BR>\n" );
document.write( "15% 20 gal<BR>\n" );
document.write( "100%     x<BR>\n" );
document.write( "Mixture 25% x+20<BR>\n" );
document.write( "..<BR>\n" );
document.write( "0.15*20+x=0.25(x+20)<BR>\n" );
document.write( "3+x=0.25x+5<BR>\n" );
document.write( "add -0.25x to both sides<BR>\n" );
document.write( "3+x-0.75x=0.25x-0.25x+5<BR>\n" );
document.write( "0.25x+3=5<BR>\n" );
document.write( "add -3 to both sides<BR>\n" );
document.write( "0.25x +3-3=5-3<BR>\n" );
document.write( "0.25x=2<BR>\n" );
document.write( "divie by 0.25<BR>\n" );
document.write( "x=2/0.25<BR>\n" );
document.write( "x=8 gallons of pure alcohol </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );