document.write( "Question 707474: How many grams of water must be evaporated from 10 grams of a 40% saline solution to produce a 50% saline solution? Please help! Thank you.
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Algebra.Com's Answer #435715 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"+w+\"$ = grams of water to be evaporated
\n" ); document.write( " $\"+.4%2A10+=+4+\"$ grams of salt in solution
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\n" ); document.write( "In words:
\n" ); document.write( "( grams of salt ) / ( grams of original solution minus water evaporated ) = 50%
\n" ); document.write( " $\"+4+%2F+%28+10+-+w+%29+=+.5+\"$
\n" ); document.write( " $\"+4+=+.5%2A%28+10+-+w+%29+\"$
\n" ); document.write( " $\"+4+=+5+-+.5w+\"$
\n" ); document.write( " $\"+.5w+=+1+\"$
\n" ); document.write( " $\"+w+=+2+\"$
\n" ); document.write( "2 grams of water must be evaporated
\n" ); document.write( "check:
\n" ); document.write( " $\"+4+%2F+%28+10+-+w+%29+=+.5+\"$
\n" ); document.write( " $\"+4+%2F+%28+10+-+2+%29+=+.5+\"$
\n" ); document.write( " $\"+4%2F8+=+.5+\"$
\n" ); document.write( " $\"+.5+=+.5+\"$
\n" ); document.write( "OK \n" ); document.write( "

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