Given Sara’s age today to be y years. Think of her age in the future or in the past. What will the following expressions indicate?
Y + 7, y – 3, y + 4
, y – 2
At first,
In future,
Sara’s age will be (y + n), after n years from now.
Now,
In past,
‘n’ years ago, Sara’s age was (y – n).
Now,
According to the question,
We can conclude that,
(y + 7) represents that the person, whose age is (y + 7) years, is 7 years elder to Sara.
And,
(y -3) represents that the person, whose age is (y – 3) years, is 3 years younger than Sara.
And,
(y + 
) represents that the person, whose age is (y + 
) years, is 
years elder to Sara.
And,
(y -
) represents that the person, whose age is (y – 
) years, is 
years younger than Sara.
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