document.write( "Question 350130: A bottle contains 850 mL of fruit punch with a concentration of 50% pure fruit juice. Jill drinks 100 mL of the punch and then refills the bottle with an equal amount of a cheaper brand of punch. If the concentration of juice in the bottle is now reduced to 48%, what was the concentration in the punch that Jill added? \n" ); document.write( "

Algebra.Com's Answer #250261 by josmiceli(19441) $\"\"$ $\"About$

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The answer in words will be:
\n" ); document.write( "(ml of pure juice she ends up with)/(total ml of punch) = 48%
\n" ); document.write( "Let $\"x\"$ = ml of pure juice in punch she added
\n" ); document.write( "Given:
\n" ); document.write( " $\"850+-+100+=+750\"$ ml of 50% punch at start
\n" ); document.write( " $\".5%2A750+=+375\"$ ml of pure juice at start
\n" ); document.write( "-----------------------------------------------
\n" ); document.write( " $\"%28375+%2B+x%29%2F850+=+.48\"$
\n" ); document.write( " $\"x%2F100\"$ = concentration of punch added
\n" ); document.write( " $\"375+%2B+x+=+.48%2A850\"$
\n" ); document.write( " $\"x+=+408+-+375\"$
\n" ); document.write( " $\"x+=+33\"$ ml
\n" ); document.write( " $\"33%2F100+=+.33\"$
\n" ); document.write( "The concentration of the punch she adds must be 33%\r
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