Question

Sanju will be three times as old as he was 4 years ago after 18 years find his present age

Answer 1

Let Sanju's age be x

Then, his age 4 years ago
= x - 4

And, his age 18 years after
= x + 18

Now, According to question,

$x + 18 = 3(x - 4)$

$= > x + 18 = 3x - 12$

$= > x - 3x = - 12 - 18$

$= > - 2x = - 30$

$= > - x = \frac{ - 30}{2}$

$= > - x = - 15$

$= > x = 15$

$\boxed{\red{Hence, \: Sanju's \: present\: age \: is \: 15\: years}}$

Hope this answer helps you.