document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=275647>Question 275647</A>: <I><SPAN STYLE=\"word-break: break-all;\"> how many gallons of hydrochloric acid must be added to 12 gallons of a 30% solution to obtain a 40% solution? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #201072 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=201072\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .30*12+x=.40(12+x)<BR>\n" );
document.write( "3.6+x=4.8+.40x<BR>\n" );
document.write( "x-.40x=4.8-3.6<BR>\n" );
document.write( ".6x=1.2<BR>\n" );
document.write( "x=1.2/.6<BR>\n" );
document.write( "x=2 gallons of acid needs to be added.<BR>\n" );
document.write( "Proof:<BR>\n" );
document.write( ".30*12+2=.4(12+2)<BR>\n" );
document.write( "3.6+2=.4*14<BR>\n" );
document.write( "5.6=5.6<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );