document.write( "Question 691968: a 50 gallon barrel of milk is 60% butterfat. how much skim milk (no butterfat) should be mixed to make milk that is 30% butterfat? \n" ); document.write( "

Algebra.Com's Answer #426901 by josmiceli(19441) $\"\"$ $\"About$

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Originally there is $\"+.6%2A50+=+30+\"$ gallons
\n" ); document.write( "of butterfat in the barrel.
\n" ); document.write( "Let $\"x+\"$ = gallons of skim milk to be added
\n" ); document.write( " $\"+30+%2F+%28+50+%2B+x+%29+=+.3+\"$
\n" ); document.write( " $\"+30+=+.3%2A%28+50+%2B+x+%29+\"$
\n" ); document.write( " $\"+30+=+15+%2B+.3x+\"$
\n" ); document.write( " $\"+.3x+=+15+\"$
\n" ); document.write( " $\"+x+=+50+\"$
\n" ); document.write( "50 gallons of skim milk must be added
\n" ); document.write( "( another 50 gallons barrel is needed, too )
\n" ); document.write( "check:
\n" ); document.write( " $\"+30+%2F+%28+50+%2B+x+%29+=+.3+\"$
\n" ); document.write( " $\"+30+%2F+%28+50+%2B+50+%29+=+.3+\"$
\n" ); document.write( " $\"+30+=+.3%2A100+\"$
\n" ); document.write( " $\"+30+=+30+n\"$
\n" ); document.write( "OK \n" ); document.write( "

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