Question

Sanjay will be 3 times as old as he was 4 years ago after 18 years. Find his present age​

Answer 1

3(x-4)=x+18

3x-12=x+18

3x-x=18+12

2x=30

x=15

present age is 15

Answer 2

Answer:

Present age of Sanjay is 15 years.

Step-by-step explanation:

Let the present age of Sanjay be a years.

After 18 years :

= > Age of Sanjay = Present age + 18 years

= > Age of Sanjay = a years + 18 years

= > Age of Sanjay = ( a + 18 ) years

Before 4 years :

= > Age of Sanjay = Present age - 4 years

= > Age of Sanjay = a years - 4 years

= > Age of Sanjay = ( a - 4 ) years

According to the question :

= > Age of Sanjay after 18 years = 3 times of age of Sanjay before 4 years

= > ( a + 18 ) years = 3( a - 4 ) years

= > a + 18 = 3( a - 4 )

= > a + 18 = 3a - 12

= > 18 + 12 = 3a - a

= > 30 = 2a

= > 15 = a

Hence the present age of Sanjay is 15 years.