document.write( "Question 431111: how many grams of alcohol must be added to 40 grams of a 15% alcohol solution to obtain a 20% alcohol solution \n" ); document.write( "
Algebra.Com's Answer #307637 by jorel1380(3719)\"\" \"About 
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1.0x+40(.15)=.20(40+x)
\n" ); document.write( "x+6=8+.2x
\n" ); document.write( ".8x=2
\n" ); document.write( "x=2/.8=2.5
\n" ); document.write( "You must add 2.5 gms of pure alcohol to get the mix..
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