a chemist mixes one liter of pure water with x liters of a 50 % salt solution, and the resulting mixture is a 15 % salt solution. what is the value of x?  Choose the correct answer: A) 1 / 4 B) 1 / 3 C) 1 / 2 D) 1 E) 3 / 7
<gadget id="calculator">50 - 15</gadget>
<output>35</output>

<gadget id="calculator">15 / 35</gadget>
<output>3/7 = around 0.428571</output>

<result>E</result>
a chemist mixes one liter of pure water with x liters of a 50 % salt solution, and the resulting mixture is a 15 % salt solution. what is the value of x?
divide(15, subtract(50, 15))
"concentration of salt in pure solution = 0 concentration of salt in salt solution = 50 % concentration of salt in the mixed solution = 15 % the pure solution and the salt solution is mixed in the ratio of - - > ( 50 - 15 ) / ( 15 - 0 ) = 7 / 3 1 / x = 7 / 3 x = 3 / 7 answer : e"