document.write( "Question 458617: how much water should be added to 18ml of 13% alcohol solution to reduce the concentration to 9%? \n" ); document.write( "
Algebra.Com's Answer #314586 by richwmiller(17219)\"\" \"About 
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from the view of alcohol
\n" ); document.write( ".13*18=.09*(18+x)
\n" ); document.write( " 8 ml. of water
\n" ); document.write( "from the view of water
\n" ); document.write( ".87*18+x=.91*(18+x)
\n" ); document.write( "8 ml of water again\r
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