document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=493651>Question 493651</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How many gallons of cream that is 20% butterfat must be mixed with milk that is 2% butterfat to get 18 gallons of milk containing 4% butterfat?\r<BR>\n" );
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document.write( "I am having trouble setting up the equation. We were thinking it went something like this...\r<BR>\n" );
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document.write( ".02x + .2x = .04(18)  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #335410 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=335410\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> How many gallons of cream that is 20% butterfat must be mixed with milk that is 2% butterfat to get 18 gallons of milk containing 4% butterfat? <BR>\n" );
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document.write( "Equation:<BR>\n" );
document.write( "fat + fat = fat<BR>\n" );
document.write( "0.02x + 0.20(18-x) = 0.04*18<BR>\n" );
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document.write( "Multiply thru by 100<BR>\n" );
document.write( "2x + 20*18 - 20x = 4*18<BR>\n" );
document.write( "-18x = -16*18<BR>\n" );
document.write( "x = 16 gallons <BR>\n" );
document.write( "18-x = 2 gallons (amt of cream needed)<BR>\n" );
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document.write( "If that method is too confusing try 2 equations with 2 variables:<BR>\n" );
document.write( "c is cream<BR>\n" );
document.write( "m is milk<BR>\n" );
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document.write( "m + c = 18<BR>\n" );
document.write( "0.02m + 0.20c = 0.04*18<BR>\n" );
document.write( "-----<BR>\n" );
document.write( "Multiply thru 1st by 2<BR>\n" );
document.write( "Multiply thru other by 100<BR>\n" );
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document.write( "2m + 2c = 2*18<BR>\n" );
document.write( "2m + 20c= 4*18<BR>\n" );
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document.write( "Subtract:<BR>\n" );
document.write( "18c = 2*18<BR>\n" );
document.write( "c = 2 gallons (amt. of cream needed)<BR>\n" );
document.write( "====<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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