document.write( "Question 715199: How much water needs to be removed from 30 liters of a 20% salt solution to change it to a 50% salt solution? \n" ); document.write( "

Algebra.Com's Answer #439280 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"+w+\"$ = liters of water to be removed
\n" ); document.write( " $\"+.2%2A30+=+6+\"$ liters of salt in 20% solution
\n" ); document.write( "-------------
\n" ); document.write( " $\"+6+%2F+%28+30+-+w+%29+=+.5+\"$
\n" ); document.write( " $\"+6+=+.5%2A%28+30+-+w+%29+\"$
\n" ); document.write( " $\"+6+=+15+-+.5w+\"$
\n" ); document.write( " $\"+.5w+=+15+-+6+\"$
\n" ); document.write( " $\"+.5w+=+9+\"$
\n" ); document.write( " $\"+w=+18+\"$
\n" ); document.write( "18 liters of water should be removed\r
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