Question 890661
Huilan's age is three times Thomas's age. 
The sum of their ages is 92 . 
What is Thomas's age?
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Thomas's age:: t
Hulian's age:: 3t
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Equation:
t + 3t = 92
4t = 92
t = 23 yrs (Thomas's age)
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Cheers,
Stan H.
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