Question

after 12 years i shall be 3 times as old as i was 4 years ago.find my present age

Answer 1

let present age be x
then 12 yrs after is x+12
4 yrs ago is x-4
x+12=3(x-4)
x+12=3x-12
12+12=3x-x
24=2x
x=12

present age is 12yrs

hope it helps!

Answer 2

let the present age be x
after 12 years age will be x+12
according to the question-
x+12=3(x-4)
x+12=3x-12
2x=12+12
x=24/2
=12
the present age is 12