Answer:
After 5 years : ( n + 5 ) years !
Before 5 years : ( n - 5 )
Step-by-step explanation:
Given the age of Mary is n years old
After 5 years , She must be 5 years more from now so,
Her age will be ( n + 5 ) years after 5 years from now !
Also, 5 years ago she must be 5 years less than from now ,
So, her age 5 years ago was ( n - 5 ) years !
