Question

My brother is 5 years older then me. My sister is 3 Years younger than me. Three years ago how much younger was my sister?

Answer 1

the answer is 1 years old 3-2=1

Answer 2

For this case we have to find out how much younger sister I was three years ago.

Let the variable "x" be my age. So:

If my brother is 5 years older then: $x + 5$

If my sister is 3 years younger then: $x-3$

For any value of "x", that is, my age, my brother will always be 5 years older and my sister 3 years younger. Then, three years ago when I was x years old, my sister was three years younger than me.

Answer:

she was three years younger than me