O ocgirl83 New member Joined Sep 3, 2005 Messages 39 Sep 3, 2005 #1 How many gallons of pure alcohol should be mixed with 20 gal of a 15% alcohol solution to obtain a mixture that is 25% alcohol?

How many gallons of pure alcohol should be mixed with 20 gal of a 15% alcohol solution to obtain a mixture that is 25% alcohol?

stapel Super Moderator Staff member Joined Feb 4, 2004 Messages 15,946 Sep 3, 2005 #2 gallons solution: 15%: ?? pure: x mix: ?? percent alcohol: 15%: ?? pure: 1 mix: ?? gallons alcohol: 15: ?? pure: (1)(x) mix: ?? Complete the table. Set the input alcohol amounts equal to the total alcohol in the mix. Solve. Eliz.

gallons solution: 15%: ?? pure: x mix: ?? percent alcohol: 15%: ?? pure: 1 mix: ?? gallons alcohol: 15: ?? pure: (1)(x) mix: ?? Complete the table. Set the input alcohol amounts equal to the total alcohol in the mix. Solve. Eliz.