Polly Garter had her first child on her 20th birthday, her second child exactly two years later, and her third child exactly two years after that. How old was Polly when her age was equal to the sum of her three children's ages?
Polly Garter had her first child on her 20th birthday, her second child exactly two years later, and her third child exactly two years after that. How old was Polly when her age was equal to the sum of her three children's ages?