Respuesta :

let

Carissa age = x

Andrea age = 3 + x

In 5 years time

x +5 + (5 + 3 + x) = 69

x + 5 + 8 + x = 69

2x = 69 - 13

2x = 56

x = 56/2

x = 28

Andrea's age = 3 + 28 = 31 years

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