document.write( "Question 342400: How many gallons of a 3% salt solution must be mixed with 20 gallons of a 9% solution to obtain a 5% solution? \n" ); document.write( "

Algebra.Com's Answer #245117 by Fombitz(32388) $\"\"$ $\"About$

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\n" ); document.write( "Let A be the amount of 3% solution.
\n" ); document.write( " $\"3A%2B9%2820%29=5%28A%2B20%29\"$
\n" ); document.write( " $\"3A%2B180=5A%2B100\"$
\n" ); document.write( " $\"2A=80\"$
\n" ); document.write( " $\"highlight%28A=40%29\"$ gallons
\n" ); document.write( " \n" ); document.write( "

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