document.write( "Question 363259: Moonshine has 50 liters of 70% alcohol solution. How many liters of pure alcohol must be added to obtain an 80% alcohol solution? \n" ); document.write( "
Algebra.Com's Answer #259139 by Fombitz(32388)\"\" \"About 
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Let A be the amount of 100% alcohol added.
\n" ); document.write( "\"100A%2B70%2850%29=80%28A%2B50%29\"
\n" ); document.write( "\"100A%2B3500=80A%2B4000\"
\n" ); document.write( "\"20A=500\"
\n" ); document.write( "\"highlight%28A=25%29\"liters
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