document.write( "Question 705998: How many liters of water should be evaporated from 140 liters of a 12% saline solution so that the solution that remains is a 20% saline solution. \n" ); document.write( "

Algebra.Com's Answer #434913 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"+w+\"$ = liters of water to be evaporated
\n" ); document.write( " $\"+.12%2A140+=+16.8+\"$ liters of salt in 12% solution
\n" ); document.write( "--------------
\n" ); document.write( "You start with $\"+16.8+\"$ liters of salt,
\n" ); document.write( "and you finish with the same amount.
\n" ); document.write( " $\"+16.8+%2F+%28+140+-+w+%29+=+.2+\"$
\n" ); document.write( " $\"+16.8+=+.2%2A%28+140+-+w+%29+\"$
\n" ); document.write( " $\"+16.8+=+28+-+.2w+\"$
\n" ); document.write( " $\"+.2w+=+28+-+16.8+\"$
\n" ); document.write( " $\"+.2w+=+11.2+\"$
\n" ); document.write( " $\"+w+=+56+\"$
\n" ); document.write( "56 liters of water need to be evaporated
\n" ); document.write( "check:
\n" ); document.write( " $\"+16.8+%2F+%28+140+-+w+%29+=+.2+\"$
\n" ); document.write( " $\"+16.8+%2F+%28+140+-+56+%29+=+.2+\"$
\n" ); document.write( " $\"+16.8+%2F+84+=+.2+\"$
\n" ); document.write( " $\"+16.8+=+.2%2A84+\"$
\n" ); document.write( " $\"+16.8+=+16.8+\"$
\n" ); document.write( "OK
\n" ); document.write( " \n" ); document.write( "

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