Question 395673
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Hi
Alex is 6 yrs. older than Frank
Let x and (x+6) represent Frank's and Alex's ages respectively
question states***
 x +(x+6) = 50
solving for x
 2x + 6 = 50
     2x = 44
      x = 22, Franks age.  Alex is 28.  (22 + 6)

CHECKING our Answer
  22 + 28  = 50