John is 24 years old. Two years ago, he was twice Shane's age at that time. How old is Shane now?

Present age of john = 24 years

Let Shane's age = x years

Two years ago

John's age = 24-2 = 22 years

Shane's age = (x-2) years

Writing in terms of equation, to the above statements

⇒22 = 2 (x-2)

⇒22 = 2 x - 4

⇒22+4 = 2 x

⇒ 2 x = 26

⇒ x = 26:2

⇒ x = 13

Present age of son = 13 years