document.write( "Question 386496: how many quarts of pure acid must be added to 5 quarts of 30% acid solution to produce a 50% acid solution? \n" ); document.write( "

Algebra.Com's Answer #273239 by Fombitz(32388) $\"\"$ $\"About$

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Pure acid is a 100% solution.
\n" ); document.write( "Let A be the amount of pure acid added.
\n" ); document.write( " $\"100A%2B30%285%29=50%28A%2B5%29\"$
\n" ); document.write( " $\"100A%2B150=50A%2B250\"$
\n" ); document.write( " $\"50A=100\"$
\n" ); document.write( " $\"highlight%28A=2%29\"$ quarts \n" ); document.write( "

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