Question

arun is 5 years younger then raj . four years later raj will be twice old as arun . find the present ages

Answer 1

Let age of raj = x
age of arun = x-5
four year later(after)
x+4 = 2(x-5+4)
x+4 = 2x-2
x = 6
age of raj = 6
age of arun = 1

Answer 2

let the age of Raj be X
and
let the age of Arun be X

after four years

x+4=2(x-5+4)

x+4=24-2

x=6

therefore,

the Arun age is 1

the Raj age is 6