document.write( "Question 888298: how much water should be added to 300 litres of a solution so that its concentration may change from 25% to 20%? \n" ); document.write( "
Algebra.Com's Answer #537252 by Alan3354(69443)\"\" \"About 
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Add W liters of water.
\n" ); document.write( "300*25 + W*0 = (300 + W)*20
\n" ); document.write( "7500 = 20W + 6000
\n" ); document.write( "W = 75 liters
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