document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=17807>Question 17807</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help!!!<BR>\n" );
document.write( "Preston antifreeze is 20% antifreeze and Icefree is 12% antifreeze.  How much of each should be used to get a 22 quart mixture of 15% antifreeze?\r<BR>\n" );
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document.write( "Thanks in advance<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #8592 by </B><A HREF=/tutors/aboutme.mpl?userid=venugopalramana><B>venugopalramana(3286)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=venugopalramana><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.geocities.com/venugopalramana/FREE_MATHS_ASSISTANCE.html valign=middle><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=8592\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Preston antifreeze is 20% antifreeze and Icefree is 12% antifreeze.  How much of each should be used to get a 22 quart mixture of 15% antifreeze?\r<BR>\n" );
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document.write( "total qty.of mixture =22 quarts<BR>\n" );
document.write( "let preston in the mix =x quarts<BR>\n" );
document.write( "so icefree in the mix =22-x quarts<BR>\n" );
document.write( " Preston antifreeze is 20% antifreeze ..so x quarts would have x*20/100=x/5 quarts..anti freeze<BR>\n" );
document.write( "Icefree is 12% antifreeze..so 22-x quarts would have (22-x)*12/100=3(22-x)/25 <BR>\n" );
document.write( "=(66-3x)/25 quarts..antifreeze..<BR>\n" );
document.write( "so total antifreeze in the mix =x/5+(66-3x)/25...<BR>\n" );
document.write( "but the final mix had 15% antifreeze..in 22 quarts total antifreeze is =22*15/100=33/10...hence we have <BR>\n" );
document.write( "x/5+(66-3x)/25=33/10<BR>\n" );
document.write( "((5x+66-3x)/25)=33/10<BR>\n" );
document.write( "(2x+66)/25=33/10<BR>\n" );
document.write( "2x+66=33*25/10=165/2<BR>\n" );
document.write( "2x=165/2-66=(165-2*66)/2=(165-132)/2=33/2...<BR>\n" );
document.write( "x=33/(2*2)=33/4 = 8.25 quarts of preston and<BR>\n" );
document.write( "22-x=22-8.25=13.75 quarts of icefree<BR>\n" );
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