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b- wiek taty
c- wiek syna
a + b + c = 93 a + 2 + a + ⅓ a = 93
a = 3×c ⁷/₃ a = 93 - 2
b = 2 + a ₇/₃ a = 91 / × ³/₇
a = 39
c = ⅓ a
c= ⅓ × 39
c= 13
b = 2 + 39
b = 41
odp: Mama ma 39 lat a tata 41 i syn ma 13.