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Samantha had three children : Ellery, Jacob and Jessy.
Their combined ages totalled half of her age.
Five years later, during which time Evelyn was born, Samatha's age equalled the total of  all her children's ages.
Ten more years have now passed.
Delphine was born during that time.
At that event Ellery was as old as Jessy and Evelyn together.
The combined ages of all the children are now double Samantha's age, which is only equal to that of Ellery and Jacob together.
Ellery's age also equals that of the two daughters.

Question : How old are they?

See answer

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