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g = 4h
4h-5 = 7h-35
35-5 = 7h-4h
30 = 3h
h = 30/3
h = 10
g = 10*4
g = 40
comprobación:
g-5 = 7(h-5)
40-5 = 7(10-5)
35 = 7*5
Respuesta:
Gina tiene 40 años actualmente