document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=352570>Question 352570</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A radiator contains 25 quarts of water and anti-freeze solution, of which 60% (by volume) is anti-freeze. How much of this solution must be drained and replaced with water for the new solution to be 40% anti-freeze? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #251999 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=251999\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A radiator contains 25 quarts of water and anti-freeze solution, of which 60% (by volume) is anti-freeze. How much of this solution must be drained and replaced with water for the new solution to be 40% anti-freeze?<BR>\n" );
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document.write( "Equation:<BR>\n" );
document.write( "water -water + water = water<BR>\n" );
document.write( "0.40*25 - 0.40x + 1.00x = 0.60*25<BR>\n" );
document.write( "-----<BR>\n" );
document.write( "Multiply thru by 100 to get:<BR>\n" );
document.write( "40*25 + 40x + 100x = 60*25<BR>\n" );
document.write( "140x = 20*25<BR>\n" );
document.write( "x = (1/7)25<BR>\n" );
document.write( "x = 3.57 quarts of the original mix must be replaced<BR>\n" );
document.write( "============================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );