Question

I am F years old and my brother is B years older. What is the sum of our ages? What will be the sum of our ages in 3 years? What was the difference of our ages 3 years ago?

Answer 1

Assuming that the variables are only F and B then the sun would simply be:
F+b
The sum in 3 years is:
(F+3)+(B+3)
Lastly the difference 3 years ago would be:
(F-3)-(B+3)