document.write( "Question 610689: how many ml of water must be added to 50ml of 75% acid solution to make a 15% acid solution? \n" ); document.write( "

Algebra.Com's Answer #384516 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"+x+\"$ = ml of water to be added
\n" ); document.write( " $\"+.75%2A50+=+37.5+\"$ ml of acid in 75% solution
\n" ); document.write( "---------------
\n" ); document.write( " $\"+37.5+%2F+%28+50+%2B+x+%29+=+.15+\"$
\n" ); document.write( " $\"+37.5+=+.15%2A%28+50+%2B+x+%29+\"$
\n" ); document.write( " $\"+37.5+=+7.5+%2B+.15x+\"$
\n" ); document.write( " $\"+.15x+=+37.5+-+7.5+\"$
\n" ); document.write( " $\"+.15x+=+30+\"$
\n" ); document.write( " $\"+x+=+200+\"$
\n" ); document.write( "200 ml of water must be added
\n" ); document.write( "check:
\n" ); document.write( " $\"+37.5+%2F+%28+50+%2B+200+%29+=+.15+\"$
\n" ); document.write( " $\"+37.5+=+.15%2A250+\"$
\n" ); document.write( " $\"+37.5+=+37.5+\"$
\n" ); document.write( "OK \n" ); document.write( "

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