document.write( "Question 357948: Set up an equation in one variable and solve it.\r
\n" ); document.write( "\n" ); document.write( "Abner has 4 liters of a 40% solution of alcohol. How much pure alcohol must he add to have an 80% solution?
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Algebra.Com's Answer #255513 by Fombitz(32388)\"\" \"About 
You can put this solution on YOUR website!
Let A be the amount of 100% alcohol added.
\n" ); document.write( "Concentration equation:
\n" ); document.write( "\"100%28A%29%2B40%284%29=80%28A%2B4%29\"
\n" ); document.write( "\"100A%2B160=80A%2B320\"
\n" ); document.write( "\"20A=160\"
\n" ); document.write( "\"highlight%28A=8%29\"liters.
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