Question

fifteen years from now ravi's age will be four times his present age .what is ravi's present age?

Answer 1

the equation is
y+15=4y
where y is his present age.
4y-y=15
3y=15y
y=15/3
y=5

Answer 2

Let , the present age of Ravi be x
Ravi's age after fifteen years = x+15
a\q,

=>x+15 = 4x
=> 4x-x =15
=> 3x =15
=> x = 15/3
=> x = 5

so,present age of Ravi is 5 years.