Question

ajay is younger than vijay by 5 years . sum of their ages is 25 years .whar is the ajay's age

Answer 1

Let the age of ajay be x

so age of Vijay will be x + 5

by the condition given in your question we get equation

x + x + 5 = 25

2x + 5 = 25

2x = 20

x = 10

so ajays age is 10 years

Answer 2

let Ajay age =x
and Vijay age=y
so, the equation is
x-y=5
and equation second is
x+y=25
then by substituting equation 1 from equation 2
x+y=25
-(x-y)=-(5)
we get
2y=20
then y=10
and putting the value of y
x+10=25
then
x=15