document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=319262>Question 319262</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A chemist has 100 cc of 20% acid, the rest being water. She adds pure acid to make the solution 33 1/3% acid. How many ccs of water must she then add to return it to 20% acid? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #228719 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=228719\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A chemist has 100 cc of 20% acid, the rest being water. She adds pure acid to make the solution 33 1/3% acid. How many ccs of water must she then add to return it to 20% acid?<BR>\n" );
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document.write( "Equation:<BR>\n" );
document.write( "acid + acid = acid<BR>\n" );
document.write( "0.20*100 + 1x = 0.333(100+x)<BR>\n" );
document.write( "Multiply thru by 1000 to get:<BR>\n" );
document.write( "200*100 + 1000x = 333*100 + 333x<BR>\n" );
document.write( "---<BR>\n" );
document.write( "667x = 133*100<BR>\n" );
document.write( "x = 19.94 cc (amt. of pure acid needed for the mixture)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "==================== </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );