document.write( "Question 823233: how much pure alcohol must be added to 4 liters of 10% alcohol solution to make a solution that is 20% alcohol? \n" ); document.write( "
Algebra.Com's Answer #495335 by TimothyLamb(4379)\"\" \"About 
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\n" ); document.write( "10*4 + 100v = 20(v + 4)
\n" ); document.write( "40 + 100v = 20v + 80
\n" ); document.write( "80v = 40
\n" ); document.write( "v = 0.5
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\n" ); document.write( "answer:
\n" ); document.write( "add 0.5 liter of pure alcohol, and you'll have 4.5 liters of 20% alcohol
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