Question

The age of a person is twice the sum of ages of his 2 sons and five years ago his age was thrice

Answer 1

let x=present age of father

let y=sum of ages of two sons

..

At present:

x=2y

5 years ago:

x-5=3(y-10)

substitute 2y for x

2y-5=3y-30

y=25

x=2y=50

Ans:

Present age of father=25