A 6-liter solution is 40% alcohol. How many liters of pure alcohol must be added to produce a solution that is 50% alcohol? Choose the correct option:	A) 1.2	B) 1.5	C) 1.8	D) 2.1	E) 2.4

Rationale: let x be the amount of pure alcohol required . 0.4 ( 6 ) + x = 0.5 ( x + 6 ) 0.5 x = 3 - 2.4 x = 1.2 liters the answer is a .
Answer: A