document.write( "Question 678596: Find how many quarts of 5% butterfat milk and 2% butterfat milk should be mixed to yield 45 quarts of 4% butterfat milk. \n" ); document.write( "
Algebra.Com's Answer #421559 by nerdybill(7384)\"\" \"About 
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Find how many quarts of 5% butterfat milk and 2% butterfat milk should be mixed to yield 45 quarts of 4% butterfat milk.
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\n" ); document.write( "Let x = amount (quarts) of 5% milk
\n" ); document.write( "then
\n" ); document.write( "45-x = amount (quarts) of 2% milk
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\n" ); document.write( ".05x + .02(45-x) = .04(45)
\n" ); document.write( ".05x + .9-.02x = 1.8
\n" ); document.write( ".03x + .9 = 1.8
\n" ); document.write( ".03x = .9
\n" ); document.write( "x = .9/.03
\n" ); document.write( "x = 30 quarts of 5% butterfat milk
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\n" ); document.write( "2% butterfat milk:
\n" ); document.write( "45-x = 45-30 = 15 quarts
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