Question

Nitin is 4 years elder than his sister if the sum of their ages is 20 years find the age of Nitin.

Answer 1

let nitins sister's age be X years then his age is 4+X years
so 4+2x=20
so X=8
therefore nitins age is 12

Answer 2

The age of Nithin is 12 Years

Explanation:

Given Condition:

1. Nitin is 4 years elder than his sister.

2. The sum of their ages is 20 years.

To find:

Find the age of Nitin.

Let,

Sister age = x

According to condition1

Nitin age = x+4

According to condition2

Sister Age + Nitin Age = 20

Substitute the sister age and nitin age to make an equation,

==> x + ( x+4) = 20

==> x+x+4 = 20

==> 2x+4 = 20

==> 2x = 20 -4

==> 2x = 16

==> x =16/2

==> x = 8

Sister's age = x

Nitin Sister's age = 8 years

so,

Nitin age = x+4

Nitin age = 8+4

Nitin age = 12 years