Question

sum of age of father and the son is 40 years if the father's age is 3 times that of his son then find their respective ages

Answer 1

let father's age be xand it is 3 times of son's age =3x
then,3x+x=404x=40x=10  son's age3x=30 father's age

Answer 2

Let age of son= x
age of father =3x
According to question
X+3x= 40
4x=40
X=10(son age)
Father age= 3x10=40