A 6-liter solution is 35% alcohol. How many liters of pure alcohol must be added to produce a solution that is 50% alcohol?	Choose the correct option:
A) 1.5  B) 1.8  C) 2.1  D) 2.4  E) 2.7
Let x be the amount of pure alcohol required.   0.35(6) + x = 0.5(x+6)   0.5x = 3 - 2.1   x = 1.8 liters   The answer is 1.8.
<result>B</result>
A 6-liter solution is 35% alcohol. How many liters of pure alcohol must be added to produce a solution that is 50% alcohol?