Question

Given Sara’s age today to be $y$ years. Think of her age in the future or in the past. What will the following expression indicate?

$y+7$$,y-3$

Answer 1

Let's analyze each of the expressions.

In Future after $n$ years since now, Sara’s age will be $\left(y+n\right)$years

In past

$n$ years ago, Sara’s age was $\left(y-n\right)$ years

$\left(y+7\right)$ denotes the person whose age is $\left(y+7\right)$ years and is $7$ years elder to Sara

$(y-3)$ denotes the person whose age is $(y-3)$ years and is $3$ years younger to Sara