Question

I am as much older than my brother who is 10 years as I am younger than my father who is 70 years.  How old I am?

Answer 1

My age = X

I am older than my brother who is 10 years old,  by X - 10 years.
I am younger than my father who is 70 years old,  by 70 - X years

So           X - 10 = 70 - X
               2 X = 80
         X = 40

My age is 40 years.

Answer 2

Answer is 40

Let siter age = x

Brother. age = x-10

Equation- x-10+x=70

2x=80

80/2=x

40=x