Answer:
gabrielas age is 15
Step-by-step explanation:
Let Gabriela's age be x, then Kelvins age is 2x
12 years ago, Gabriela's age was x - 12 and Kelvin's age was 6(x - 12)
i.e. 6x - 72 = 2x - 12
4x = 60
x = 60/4 = 15
Therefore, Kelvin's age is 2(15) = 30 years old
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