The age of the father 4 years ago was 8 times the age of his son. At present, the
father's age is 4 times that of his son. Find the present age of the son.
9 years
7 years
14 years
18 years
B.
7 years
Let the present age of son = x years
Therefore,
the present age of father = 4x years
According to the question,
4 years ago
8(x-4) = 4x-4
8x-32 = 4x-4
8x-4x = 32-4
4x = 28
x = 28/4 = 7 years