Question 1181825
Let assume that Carmen's age is x, & David's age is y.
Carmen is 12 years older than David Hence,

  x = y + 12  ---- (1)
  
Five years ago, the sum of their ages was 28 so,
 
  (x-5) + (y-5) = 28
   
  x + y - 10 = 28

  x + y = 38 ------ (2)
From Equation 1 & 2,

 2x = 50
 x = 25 year

So, Age of Carmen is 25 Year.