Question 814222
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Hi,
A man is 3 times as old as his son.
Let x represent the son's age and 3x the father's age
Question states***The sum of their ages is 48 years
 x + 3x = 48
Solving for x
 4x = 48
  x = 12, the age of the son.  The father is 36
CHECKING our Answer***
  12 + 36 = 48