Poll Title: A boy is 17 years old and his sister is twice as old.
https://www.polleverywhere.com/multiple_choice_polls/kWGzWau5cwEZQaw48
Poll Title: A boy is 17 years old and his sister is twice as old.
https://www.polleverywhere.com/multiple_choice_polls/kWGzWau5cwEZQaw48