SOLUTION: how many liters of 10% silver iodide solution must be mixed with 3 litters of a 4% silver iodide solution to get a %6 solution?

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Question 753995: how many liters of 10% silver iodide solution must be mixed with 3 litters of a 4% silver iodide solution to get a %6 solution?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
(total silver iodide)/(amount of solution)=(concentration of silver iodide)

let v = liters of the 10% silver iodide solution to use

%2810v%2B4%2A3%29%2F%28v%2B3%29=6
Divide both sides by 2
%285v%2B2%2A3%29%2F%28v%2B3%29=3
5v%2B6=3%28v%2B3%29
5v%2B6=3v%2B9
2v=9-3
2v=6
v=3 liters