document.write( "Question 909613: This is from the Glencoe Mathematics Algebra 1 Michigan edition book. Page 175 number 24. \r
\n" ); document.write( "\n" ); document.write( "How much whipping cream and 2% milk should be mixed to obtain 35 gallons of milk with 4% butterfat? \r
\n" ); document.write( "\n" ); document.write( "2% milk has 2% butterfat
\n" ); document.write( "Whipping cream has 9% butterfat
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Algebra.Com's Answer #551951 by stanbon(75887)\"\" \"About 
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How much whipping cream and 2% milk should be mixed to obtain 35 gallons of milk with 4% butterfat?
\n" ); document.write( " 2% milk has 2% butterfat
\n" ); document.write( " Whipping cream has 9% butterfat
\n" ); document.write( "-----
\n" ); document.write( "Equation::
\n" ); document.write( "fat + fat = fat
\n" ); document.write( "0.09x + 0.02(35-x) = 0.04*35
\n" ); document.write( "-----
\n" ); document.write( "9x + 2*35 - 2x = 4*35
\n" ); document.write( "7x = 2*35
\n" ); document.write( "x = 10 gallons (amt. of whipping cream needed)
\n" ); document.write( "35-x = 25 gallons (amt. of 2% mild needed)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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