Tina's age is 4 years less than 3 times her niece's age. If her niece's age is x years, which of the following expressions best shows Tina's age?
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Since, Tina's niece's age is given to be x,
And Tina is 4 years less than thrice her age
=> Tina's age is given by 3x - 4
And Tina is 4 years less than thrice her age
=> Tina's age is given by 3x - 4
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