document.write( "Question 1057724: I am trying to clarify the notion of fresh versus salt water with a class. The ocean has a salinity level of 3.5%. If I have 8 ounces of fresh water, how much salt must I add to achieve a solution with 3.5% salinity? I would like to create this mixture for the students. \n" ); document.write( "

Algebra.Com's Answer #672740 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"+x+\"$ = ounces of salt you need to add
\n" ); document.write( " $\"+x+%2F+%28+8+%2B+x+%29+=+.035+\"$
\n" ); document.write( " $\"+x+=+.035%2A%28+8+%2B+x+%29+\"$
\n" ); document.write( " $\"+x+=+.28+%2B+.035x+\"$
\n" ); document.write( " $\"+.965x+=+.28+\"$
\n" ); document.write( " $\"+x+=+.2902+\"$
\n" ); document.write( "---------------------
\n" ); document.write( "You need to add .2902 ounces of salt
\n" ); document.write( "( .29 or .3, whatever the limits of accuracy are )
\n" ); document.write( "---------------------
\n" ); document.write( "check:
\n" ); document.write( " $\"+x+%2F+%28+8+%2B+x+%29+=+.035+\"$
\n" ); document.write( " $\"+.2902+%2F+%28+8+%2B+.2902+%29+=+.035+\"$
\n" ); document.write( " $\"+.2902+=+.035%2A8.2902+\"$
\n" ); document.write( " $\"+.2902+=+.29016+\"$
\n" ); document.write( "close enough\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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