SOLUTION: In a chemistry class, 12 L of a 12% alcohol solution must be mixed with 20% solution to get a 14% solution. how many liters of the 20% solution are needed

Question 498715: In a chemistry class, 12 L of a 12% alcohol solution must be mixed with 20% solution to get a 14% solution. how many liters of the 20% solution are needed
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
percent ---------------- quantity
Alcohol I 12 ---------------- 12 gallons
Alcohol II 20 ---------------- x gallons
Mixture 14 ---------------- 12 + x gallons

12*12+20x= 14 ( 12 + x )
144 + 20 x = 168 + 14 x
20 x + -14 x = 168 - -144
6 x = 24
/ 6
x = 4
4 gallons of 20 % Alcohol II

RELATED QUESTIONS
In a chemistry class, 12 L of a 12% alcohol solution must be mixed with a 20% solution to (answered by nerdybill)

In a chemistry class, 12 L of a 12% alcohol solution must be mixed with a 2% solution... (answered by checkley71)

In a chemistry class, 12 L of a 12% alcohol solution must be mixed with a 2% solution to... (answered by josmiceli)

In a chemistry class, 12 liters of a 12% alcohol solution must be mixed with a 20%... (answered by scott8148)

in chemistry class, 21 liters of 12% alcohol solution must be mixed with 20% solution to... (answered by ewatrrr)

In a chemistry class, 12L of a 12% alcohol solution must be mixed with a 20% solution to... (answered by stanbon,Nate)

In a chemistry class, 6 liters of a 12% alcohol solution must be mixed with a 20%... (answered by mananth,josmiceli)

In a chemistry class, 12 liters of a 15% alcohol solution must be mixed with a 20% (answered by jorel1380)

In chemistry class, 14 liters of a 12% alcohol solution must mixed with a 20% solution to (answered by Alan3354,ikleyn)