Question

15 year from new ravi age will be 4 times his present age what is ravi age.

Answer 1

Let the Ravi present age be x.
After 15 year =(x+15)
A/q
$4x = (x + 15) \\ 4x - x = 15 \\ 3x = 15 \\ x = \frac{15}{3}$
$x = 5$
Hence,the present age of Ravi is 5 years

Answer 2

Let, the present age of Ravi be 'x' years.
According to question,
x+15=4x
15=4x-x
15=3x
15/3=x
x=5
Hence,the present age of Ravi is 5 years.