Three liquids are at temperatures of 9 ◦C, 24◦C, and 30◦C, respectively. Equal masses of the first two liquids are mixed, and the equilibrium temperature is 15◦C. Equal masses of the second and third are then mixed, and the equilibrium temperature is 26.2 ◦C.
Find the equilibrium temperature when equal masses of the first and third are mixed.
Answer in units of ◦C
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