Hi

Paul is 15 years younger then Ken

Let x and (x-15) represent Ken and Paul's ages NOW respectively

Write as we Read*** in five years...

 [x+5] = 2[(x-15) + 5]

solving for x

 x + 5 = 2x - 20

    25 = x, Ken's age now, Paul is now 10.  Paul be in four years will be 14.



CHECKING our Answer***in five years...

  30 = 2*15 

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