A chemist mixes one liter of pure water with x liters of a 30% salt solution, and the resulting mixture is a 15% salt solution. What is the value of x?
Choose the correct choice from the following answers:
A) 1/4 B) 1/3 C) 1/2 D) 1 E) 3
Concentration of salt in pure solution = 0   Concentration of salt in salt solution = 30%   Concentration of salt in the mixed solution = 15%   The pure solution and the salt solution is mixed in the ratio of --&gt; (30 - 15)/(15 - 0) = 1/1   1/x --  (30 - 15)/(15 - 0)= 
<gadget id="calculator">--  (30 - 15)/(15 - 0)</gadget>
<output>1</output>
1/1   1/x= 1/1= 
<gadget id="calculator">1/1</gadget>
<output>1</output>
1   Answer: 1
<result>D</result>
A chemist mixes one liter of pure water with x liters of a 30% salt solution, and the resulting mixture is a 15% salt solution. What is the value of x?