Question

A is two years younger than B. If B is x years old, how old was A 4 years ago.
a) x-2
b) x+2
c) x
d) x-6​

Answer 1

Answer:

d) $(x-6)$

Step-by-step explanation:

Given : Present age of B = $x$ years

          A is two years younger than B.

          Present age of A = $(x-2)$ years

To find : Age of A before 4 years = ?

Solution :

It is given that the present age of A = $(x-2)$ years

Now, $4$ years ago, The age of A must be $4$ years less than the present age.

So, the age of A before $4$ years = $(x-2) - 4$

                                              = $(x-6)$ years

∴ $4$ years ago, the age of A was $(x-6)$ years.

Answer 2

The age of B is given to be '$x$'

• As per the question, A is 2 years younger than B

      That means we will have to subtract 2 from the age of B

age of A = $x-2$

$x-2$ is the current age of A

• We have to find age 4 years age

     That means we will have to subtract 4 from the current age of A

age of A 4 years age = $x-2$ $-4$

                                    =$x-6$

Age of 'A' 4 years ago was $x-6$

So, the correct answer will be option d.