document.write( "Question 779087: How much water should be added to 14mL of 9% alcohol solution to reduce the concentration to 7% \n" ); document.write( "
Algebra.Com's Answer #475060 by josmiceli(19441)\"\" \"About 
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Let \"+w+\" = ml of water to be added
\n" ); document.write( "The ml of alcohol never changes
\n" ); document.write( "\"+%28+.09%2A14+%29+%2F+%28+14+%2B+w+%29+=+.07+\"
\n" ); document.write( "\"+1.26+=+.07%2A%28+14+%2B+w+%29+\"
\n" ); document.write( "\"+1.26+=+.98+%2B+.07w+\"
\n" ); document.write( "\"+.07w+=+.28+\"
\n" ); document.write( "\"+x+=+4+\"
\n" ); document.write( "4 ml of water must be added
\n" ); document.write( "check:
\n" ); document.write( "\"+%28+.09%2A14+%29+%2F+%28+14+%2B+w+%29+=+.07+\"
\n" ); document.write( "\"+%28+.09%2A14+%29+%2F+%28+14+%2B+4+%29+=+.07+\"
\n" ); document.write( "\"+1.26+=+.07%2A18+\"
\n" ); document.write( "\"+1.26+=+1.26+\"
\n" ); document.write( "OK
\n" ); document.write( "
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