San Antonio College Mechanics, Heat and Sound

Three liquids are at temperatures of 14 ?C, 25?C, and 33?C, respectively. Equal masses of the first two liquids are mixed, and the equilibrium temperature is 16?C. Equal masses of the second and third are then mixed, and the equilibrium temperature is 27.9 ?C. Find the equilibrium temperature when equal masses of the first and third are mixed.Answer in units of ?C.