document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=29805>Question 29805</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Help!<BR>\n" );
document.write( "A chemist needs a solution of tannic acid that is 70% pure. How much distilled water must she add to 5 gallons of acid which is 90% pure to obtain 70% solution? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #16524 by </B><A HREF=/tutors/aboutme.mpl?userid=longjonsilver><B>longjonsilver(2297)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=longjonsilver><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=longjonsilver><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=16524\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> look at my Lesson on \"Mixture\" questions.\r<BR>\n" );
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document.write( "BEFORE: 5 gallons 90% acid and x gallons of 0% acid<BR>\n" );
document.write( "AFTER: (5+x) gallons 70% acid\r<BR>\n" );
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document.write( "5*0.90 + x*0.00 = (5+x)*0.70<BR>\n" );
document.write( "4.5 + 0 = 3.5 + 0.7x<BR>\n" );
document.write( "1 = 0.7x<BR>\n" );
document.write( "x = 1/0.7<BR>\n" );
document.write( "x = 1.43 gallons of distilled water (to 2dp)\r<BR>\n" );
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document.write( "jon.<BR>\n" );
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