document.write( "Question 331753: How much pure alcohol should be added to 400 ml. of 15% strength to make its strength 32%?
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Algebra.Com's Answer #237804 by mathmandotcom(31)\"\" \"About 
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.15(400) +1x=.32(400+x): 1=100% x=amount of prue alcohol needed
\n" ); document.write( "60+x=120+.32x: subtract 60 from both sides
\n" ); document.write( "x=60+.32x: subtract .32x from both sides
\n" ); document.write( ".68x=60; divide by .68
\n" ); document.write( "x=60/.68; simplify
\n" ); document.write( "x=88.235ml at least
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