Three 3-liter bottle, 7 liters, 5 liters, respectively, are filled with oxygen (pressure of 2 x 10 5 Pa), nitrogen (pressure of 3 x 10 5 Pa) and carbon dioxide (pressure of 0.6 x 10 5 Pa) for one the same temperature. The cylinders are connected to each other, and a mixture of the same temperature. Find the pressure of the mixture.

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