A man is 36 years older than his son. In THREE years, his age will be THRICE the age of his son. The present age of this son is  Pick:
A) 28 years	B) 22 years	C) 18 years	D) 16 years	E) 15 years
Let's Son age is x, then Father age is x+36.   =&gt; 3(x+3) = (x+36+3)   =&gt; 3x+9 = x+39   =&gt; 2x = 30 years = 15 Y15 yearsARS   Answer: 15 years
<result>E</result>
A man is 36 years older than his son. In THREE years, his age will be THRICE the age of his son. The present age of this son is