document.write( "Question 367659: How much pure acid should be mixed with 6 gallons of a 20% acid solution in order to get a 40% acid solution? \n" ); document.write( "

Algebra.Com's Answer #262064 by Fombitz(32388) $\"\"$ $\"About$

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Let A be the amount of 100% acid.
\n" ); document.write( " $\"100A%2B20%286%29=40%28A%2B6%29\"$
\n" ); document.write( " $\"100A%2B120=40A%2B240\"$
\n" ); document.write( " $\"60A=120\"$
\n" ); document.write( " $\"highlight%28A=2%29\"$ gallons
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