Question

pranay 's father is seven times his age now.Two years later he will be five times as old as his son will be.Find their present age.

Answer 1

let pranay's age be x
his father's age =7x
two years later
5(x+2)=7x+2
5x+10=7x+2
8=2x
x=4
pranay's age is 4years
and his fathers =4×7=28years 

Answer 2

let pranay's present age be x
then his father ' s age 7x

after 2 yrs pranay' s father age (7x+2)
pranay' s age (x+2)

according to given question

(7x+2)=5(x+2)

7x+2=5x+10

7x-5x=10-2

2x=8
x=4
therefore pranay's age = 4yrs
his father's age = 28