document.write( "Question 305285: How many ounces of water should be evaporated from 90 ounces of a 10% salt solution in order to make a 15% salt solution \n" ); document.write( "

Algebra.Com's Answer #218574 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"x\"$ = ounces of water to evaporate
\n" ); document.write( "given:
\n" ); document.write( "salt in 10% salt solution: $\".1%2A90+=+9\"$
\n" ); document.write( "In words
\n" ); document.write( "(ounces of salt in 10% solution)/(ounces of final solution) = 15%
\n" ); document.write( " $\"9%2F%2890+-+x%29+=+.15\"$
\n" ); document.write( " $\"9+=+.15%2A%2890+-+x%29\"$
\n" ); document.write( " $\"9+=+13.5+-+.15x\"$
\n" ); document.write( " $\".15x+=+13.5+-+9\"$
\n" ); document.write( " $\".15x+=+4.5\"$
\n" ); document.write( " $\"x+=+30\"$ ounces
\n" ); document.write( "30 ounces of water must be evaporated
\n" ); document.write( "check answer:
\n" ); document.write( "Removing 30 ounces of water from the $\"90+-+9+=+81\"$ ounces
\n" ); document.write( "of water leaves $\"51\"$ ounces of water
\n" ); document.write( " $\"9%2F%2851+%2B+9%29+=+.15\"$
\n" ); document.write( " $\"9%2F60+=+.15\"$
\n" ); document.write( " $\"9+=+9\"$
\n" ); document.write( "OK
\n" ); document.write( " \n" ); document.write( "

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