SOLUTION: Phil is 13 years old and his father is 4 times older. In how many years will the father be twice as old as his son?

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Question 918730: Phil is 13 years old and his father is 4 times older. In how many years will the father be twice as old as his son?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
Phil 13 , his father 52 now.
x the number of years hence
52 + x = 2(13+x)
26yr = x,years hence
And ... checking
78 = 2(39)