SOLUTION: Peter's age 13 years ago was 1/3 of his age seven years hence. How old is peter?

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Question 776779: Peter's age 13 years ago was 1/3 of his age seven years hence. How old is peter?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Peter's age 13 years ago was 1/3 of his age seven years hence. How old is peter?
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Equation::
p-13 = (1/3)(p+7)
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3p - 39 = p + 7
2p = 46
Peter's age = 23 yrs.
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Cheers,
Stan H.