document.write( "Question 819270: How many liters of pure alcohol must be added to 20 liters of a 30% solution to obtain an 80% solution? \n" ); document.write( "
Algebra.Com's Answer #492989 by TimothyLamb(4379)\"\" \"About 
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30(20) + 100v = 80(20 + v)
\n" ); document.write( "600 + 100v = 1600 + 80v
\n" ); document.write( "20v = 1000
\n" ); document.write( "v = 50
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\n" ); document.write( "answer:
\n" ); document.write( "add 50 liters of pure alcohol
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