document.write( "Question 394397: How many liters of what must be added to 20 liters of 15% salt solution to make 10% salt solutoin? \n" ); document.write( "

Algebra.Com's Answer #279837 by josmiceli(19441) $\"\"$ $\"About$

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To make the solution less concentrated, water must be added.
\n" ); document.write( "In words:
\n" ); document.write( "(total salt)/(total solution) = 10%
\n" ); document.write( "Let $\"a\"$ = liters of water to be added
\n" ); document.write( "given:
\n" ); document.write( " $\".15%2A20+=+3\"$ liters salt
\n" ); document.write( "-------------------
\n" ); document.write( " $\"3%2F%28a+%2B+20%29+=+.1\"$
\n" ); document.write( " $\"3+=+.1%2A%28a+%2B+20%29\"$
\n" ); document.write( " $\"3+=+.1a+%2B+2\"$
\n" ); document.write( " $\".1a+=+1\"$
\n" ); document.write( " $\"a+=+10\"$
\n" ); document.write( "10 liters of water must be added
\n" ); document.write( "check:
\n" ); document.write( " $\"3%2F%2810+%2B+20%29+=+.1\"$
\n" ); document.write( " $\"3%2F30+=+.1\"$
\n" ); document.write( " $\".1+=+.1\"$
\n" ); document.write( "OK \n" ); document.write( "

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