document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=159555>Question 159555</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How much pure acid should be mixed with 7 gallons of a 40% acid solution in order to get an 80% acid solution? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #117648 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=117648\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> How much pure acid should be mixed with 7 gallons of a 40% acid solution in order to get an 80% acid solution?<BR>\n" );
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document.write( "acid + acid = acid<BR>\n" );
document.write( "0.40*7 + 1.00x = 0.80(7+x)<BR>\n" );
document.write( "40*7 + 100x = 80(7+x)<BR>\n" );
document.write( "280 + 100x = 560 80x<BR>\n" );
document.write( "20x = 280<BR>\n" );
document.write( "x = 14 gallons (amount of 100% acid that must be added)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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