A chemist mixes one liter of pure water with x liters of a 30% salt solution, and the resulting mixture is a 20% salt solution. What is the value of x?  Choose the correct option
A) 1/4 B) 1/3 C) 1/2 D) 1 E) 2
Concentration of salt in pure solution = 0   Concentration of salt in salt solution = 30%   Concentration of salt in the mixed solution = 20%   The pure solution and the salt solution is mixed in the ratio of --&gt; (30 - 20)/(20 - 0) = 1/2   1/x = 1/2   x = 2   Answer: 2
<result>E</result>
A chemist mixes one liter of pure water with x liters of a 30% salt solution, and the resulting mixture is a 20% salt solution. What is the value of x?