Son's age is now one-third of father's age. In twelve years from now son's age will be one half of the father's age . What is the son's age in years now ?
A
6
B
10
C
24
D
12
Correct Answer: 12
x, 3x 2( x + 12) = 3x + 12 3x - 2x = 24 - 12 x = 12