Question

4 years ago my father's age was 4 times that of my age. At present the sum of my father's age and
of mine is 5 years. What is my father's present age?​

Answer 1

let your age four years ago be X years

then four years ago your father's age=4x

after four years your age=X+4

after four years your father age= 4x+4

equation is

5={X+4}+(4x+4)

5=5x+8

X=15