document.write( "Question 699001: how many liters of water must be added to 30L of a 30% acid solution in order to produce a 20% acid solution? \n" ); document.write( "

Algebra.Com's Answer #431166 by josmiceli(19441) $\"\"$ $\"About$

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There is no change in the quantity of acid
\n" ); document.write( " $\"+.3%2A30+=+9+\"$ liters of acid in 30% solution
\n" ); document.write( "Let $\"+x+\"$ = liters of water to be added
\n" ); document.write( "-----------
\n" ); document.write( " $\"+9+%2F+%28+x+%2B+30+%29+=+.2+\"$
\n" ); document.write( " $\"+9+=+.2%2A%28+x+%2B+30+%29+\"$
\n" ); document.write( " $\"+9+=+.2x+%2B+6+\"$
\n" ); document.write( " $\"+.2x+=+3+\"$
\n" ); document.write( " $\"+x+=+15+\"$
\n" ); document.write( "15 liters of water must be added
\n" ); document.write( "check:
\n" ); document.write( " $\"+9+%2F+%28+15+%2B+30+%29+=+.2+\"$
\n" ); document.write( " $\"+9+%2F+45+=+.2+\"$
\n" ); document.write( " $\"+9+=+.2%2A45+\"$
\n" ); document.write( " $\"+9+=+9+\"$
\n" ); document.write( "OK
\n" ); document.write( " \n" ); document.write( "

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