Question

Asif is 3 years older than Arif. Sum of their ages is 21. Find their ages?

Answer 1

let Arif age be x years
then Asif age is x+3 years

atq(according to question)
x+x+3=21
2x=18
x=9years

arif=9years
asif=12years

Answer 2

Let arif-x
Then asif-x+3
Sum of their ages=21
Given-x+x+3=21
-2x+3=21
-2x=18
-x=18/2
-x=9
Therefore arif=9yrs
asif=12yrs