document.write( "Question 1030784: How many grams of cream containing 12% butterfat must be added to 1500 grams of milk containing 2% butterfat to obtain milk having 4% butterfat? \n" ); document.write( "
Algebra.Com's Answer #645566 by addingup(3677)\"\" \"About 
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- How many grams of cream containing 12%: Let the amount be x
\n" ); document.write( "- added to 1500 containing 2%: this will be 1500-x
\n" ); document.write( "- to obtain 1500 at 4%: this will be 0.04(1500)
\n" ); document.write( "We have so far:
\n" ); document.write( "0.12x+0.02(1500-x) = 0.04(1500)
\n" ); document.write( "0.12x+30-0.02x = 60
\n" ); document.write( "0.10x = 30
\n" ); document.write( "x = 300 You have to add 300 grams of 12%
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