document.write( "Question 72854: How much pure (100%) antifreeze must be added to 4 quarts of 20% antifreeze solution to produce a 25% antifreeze solution? \n" ); document.write( "
Algebra.Com's Answer #52125 by blfaust(5)\"\" \"About 
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You would need to add .2666666 quarts of pure (100%)anitfreeze to 4 quarts of a 20% solution to make it a 25% solution.
\n" ); document.write( "In 4 quarts, a 20% solution is .8 quarts of antifreeze. 4*(.2)=y => .8=y
\n" ); document.write( "That can be rewritten as \"%28.8%29%2F4+=+.2\"
\n" ); document.write( "To solve set up as \"%28.8%2Bx%29%2F%284%2Bx%29=.25\"
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