document.write( "Question 941399: how much water should be added to a 20L of a 20% salt solution to dilute it to 15% salt solution \n" ); document.write( "
Algebra.Com's Answer #573831 by stanbon(75887)\"\" \"About 
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how much water should be added to a 20L of a 20% salt solution to dilute it to 15% salt solution
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\n" ); document.write( "Equation:
\n" ); document.write( "water + water = water
\n" ); document.write( "0.80*20 + 1*x = 0.85(20+x)
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\n" ); document.write( "80*20 + 100x = 85*20 + 85x
\n" ); document.write( "15x = 5*20
\n" ); document.write( "x = 6 2/3 L (amt of water to add)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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