document.write( "Question 222374: How many gallons of milk containing 5% butterfat must be mixed with 90 gallons of 1% milk to get 2% milk? \n" ); document.write( "
Algebra.Com's Answer #166495 by stanbon(75887)\"\" \"About 
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How many gallons of milk containing 5% butterfat must be mixed with 90 gallons of 1% milk to get 2% milk?
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\n" ); document.write( "Equation:
\n" ); document.write( "fat + fat = fat
\n" ); document.write( "0.05x + 0.01*90 = 0.02(x+90)
\n" ); document.write( "Multiply thru by 100 to get:
\n" ); document.write( "5x + 1*90 = 2x + 2*90
\n" ); document.write( "3x = 90
\n" ); document.write( "x = 30 gallons (amount of 5% milk needed for the mixture)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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