SOLUTION: Mark is 10 years older than his sister Sarah. In 4 years, he will be twice as old as Sarah. How old is each of them now?

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Question 686207: Mark is 10 years older than his sister Sarah. In 4 years, he will be twice as old as Sarah. How old is each of them now?
Answer by randyjoseph7(13) About Me  (Show Source):
You can put this solution on YOUR website!
mark can be 16
and sarah can be 6
in 4 years he will be 20 and she will be 10.
20 is half of 10.