A man is 18 years older than his son. In two years, his age will be twice the age of his son. The present age of this son is
Pick one:
A) 21 years B) 22 years C) 23 years D) 12 years E) 16 years

Rationale: "explanation : let ' s son age is x , then father age is x + 18 . = > 2 ( x + 2 ) = ( x + 18 + 2 ) = > 2 x + 4 = x + 20 = > x = 16 years option e"
Answer: E