Question

a father is 20 years older than his son.12 years ago,the age of the father was six times that if his son. find their present age.

Answer 1

let his son age be=x
then , father age =x+20
12 yrs ago,
son age =x -12
father age= 3(x-12)
x-12=3x-36
x-3x=-36+12
-2x=-24
x=24/2
x=12 
then his son age =12 yrs 
his father age =32 yrs

Answer 2

Answer:

let his son age be=m

then , father age =m+20

12 yrs ago,

son age =m -12

father age= 3(m-12)

m-12=3m-36

m-3m=-36+12

-2m=-24

m=24/2

m=12  

then his son age =12 yrs  

his father age =32 yrs

Step-by-step explanation: