Question

My age is thrice my age 3 years hence minus thrice my age 3 years ago. What is my age ? This question is in book I know my age.

Answer 1

Let my age now = x

My age in three years time = 3 + x

My age three years ago =  x - 3

From the statement:

x = 3(x+3) - 3(x-3)

x = 3x + 9 - 3x + 9

x = 18

My age now = 18 years

Answer 2

Answer:18 ys

Step-by-step explanation:

let my present age is x

and 3 years hence my age will be x+3 and 3 years ago my age was x-3

according to question  

x =3[(x+3)-(x-3)]

⇒x=3[x+3-x+3]

⇒x=3*6

⇒x=18

so my present age is 18 years.