Question

15 yrs old from now Ravi's age will be four times his present age .what is present age?

Answer 1

let present age be x
after 15years his age will be 4x
so
15+x=4x
15=3x
x=5
present age = 5

Answer 2

let his present age be x
x+ 15 =4x
×=5
present age of ravi 3 years