document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=65729>Question 65729</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/093979862x/algebrahomeworkh>An Incremental Development</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> A barrel contains 30 gallons of 40% antifreeze. How many gallons of an 80% antifreeze solution should be added to make the barrel contain 50% antifreeze? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #46413 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=46413\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A barrel contains 30 gallons of 40% antifreeze. How many gallons of an 80% antifreeze solution should be added to make the barrel contain 50% antifreeze?<BR>\n" );
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document.write( "40% antifreeze DATA:<BR>\n" );
document.write( "Amount = 30 gallons ; Amount of active ingredient = 0.40(30)= 12 gallons<BR>\n" );
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document.write( "80% antifreeze DATA:<BR>\n" );
document.write( "Amount = x gallons ; Amount of active ingredient = 0.80x gallons<BR>\n" );
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document.write( "50% Mixture DATA:<BR>\n" );
document.write( "Amount = x+30 gallons ; Amount of active ingredient = 0.50(x+30)gallons<BR>\n" );
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document.write( "EQUATION:<BR>\n" );
document.write( "active + active = active<BR>\n" );
document.write( "12 +0.80x = 0.50(x+30)<BR>\n" );
document.write( "12+0.08x=0.05x+15<BR>\n" );
document.write( "0.03x=3<BR>\n" );
document.write( "x=100 gallons of 80% antifreeze must be added.<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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