Respuesta:
A = 117
B = 91
C = 26
Explicación paso a paso:
A / 9 = B / 7 = C / 2
A / 9 = B / 7
A = 9B / 7
B / 7 = C / 2
B = 7C / 2
B - C = 65
7C / 2 - C = 65
(7C - 2C) / 2 = 65
5C = 65 * 2
5C = 130
C = 130 / 5
C = 26
B = 7C / 2
B = 7(26) / 2
B = 7 * 13
B = 91
A = 9B / 7
A = 9(91) / 7
A = 117