My age is c write an expressions for the ages for all of my family if : my brother is 3 years older than me

Question

My brother is 3 years older than me

Answer 1

So far, we know:

    your age = c

   you brother's age = (c+3)

 

That means that the sum of your two ages is:

   (your age)  +  (your brother's age)

    c  +  (c+3)

    2c + 3

 

Any other siblings?   Should you consider parents?

Answer 2

It is impossible to write expressions for the ages for all of your family if we don't know how their ages relate to yours.

Let c = your age

Let c + 3 = your brother's age