Question

Robert 's father is 4 time as old as Robert. after 5yrs father will be three times a old as Robert find the present age

Answer 1

let robert present age be x

so his father age is 4x

after five years,

3(x+5) =4x +5

3x +15 =4x +5

x=10yrs

so robert 's present age is 10 yrs and his father age is 40yrs

Answer 2

hope you will understand