SOLUTION: a boy is twice as old as her sister, if the sister is 4 years old. how old is the boy?

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Question 315137: a boy is twice as old as her sister, if the sister is 4 years old. how old is the boy?
Answer by nerdybill(7384) About Me  (Show Source):
You can put this solution on YOUR website!
The boy is then 8 years old.