document.write( "Question 1074257: How many liters of a 11% salt solution must mixed with 10 liters of a 30% salt solution to obtain a 21% salt solution
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Algebra.Com's Answer #688946 by Alan3354(69443)\"\" \"About 
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How many liters of a 11% salt solution must mixed with 10 liters of a 30% salt solution to obtain a 21% salt solution
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\n" ); document.write( "Use L liters.
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\n" ); document.write( "then,
\n" ); document.write( "L*11 + 10*30 = (L+10)*21
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