Three liquids are at temperatures of 11°C,
19°C, and 29°C, respectively. Equal masses of
the first two liquids are mixed, and the equi-
librium temperature is 14°C. Equal masses of
the second and third are then mixed, and the
equilibrium temperature is 24.5°C.
Find the equilibrium temperature when
equal masses of the first and third are mixed.
Answer in units of °C.