SOLUTION: Ray is 21 years older than his sister Mary. In 7 years, he will be twice as old as Mary. How old is each of them now?

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Question 1059079: Ray is 21 years older than his sister Mary. In 7 years, he will be twice as old as Mary. How old is each of them now?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Ray is 21 years older than his sister Mary. In 7 years, he will be twice as old as Mary. How old is each of them now?
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2x as old and a difference of 21 --> 21 & 42 THEN.