Respuesta :

B = (5/9)A
C = (1/2)(A+B)
C = (1/2)(A+(5/9)A)
C=(5/18)A

A + B + C = 91
A + (5/9)A + (5/18)A = 91

(33/18)A = 91

A = 49 + 7/11

B = (5/9)A

B = (5/9)(539/11)

B = 27 2/9 or 27.22