document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=651716>Question 651716</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How much of a 50% acid solution must be mixed with 50 gallons of a 12% acid solution to obtain a solution that is 40% acid?\r<BR>\n" );
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document.write( "I tried to do 0.5X + 50(0.12)= 0.4, but I got a negative answer. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #407774 by </B><A HREF=/tutors/aboutme.mpl?userid=nerdybill><B>nerdybill(7384)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nerdybill><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=nerdybill><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=407774\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> How much of a 50% acid solution must be mixed with 50 gallons of a 12% acid solution to obtain a solution that is 40% acid? <BR>\n" );
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document.write( "Let x = amount (gallons) of 50% acid added<BR>\n" );
document.write( "then<BR>\n" );
document.write( ".50x + .12(50) = .40(x+50)<BR>\n" );
document.write( ".50x + 6 = .40x+20<BR>\n" );
document.write( ".10x + 6 = 20<BR>\n" );
document.write( ".10x = 14<BR>\n" );
document.write( "x = 14/.10<BR>\n" );
document.write( "x = 140 gallons\r<BR>\n" );
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document.write( " </SPAN>\n" );
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