Question

after 15 years ravi's age will be 4 times of his present age write in the simple equation

Answer 1

Let Ravi's present age be X

After 15 years his age will be X + 15

At the same time it will be 4 times his present age i.e 4X

4X = X+15

4X - X = 15

3X = 15

X = 5

Verification

Ravi's present age = 5

After 15 years his age will be = 5 + 15 = 20

20 is 4 times of 5

Answer 2

Let present age be x
after 15 years
x+15=4x
15=4x-x
15=3x
15/3=x hence present age is 5 years