Question

Mr.Sohanlal is 4 times as old as his son .Four years hence the sum of their ages will be 43 years.The present age of son is

Answer 1

Let the son's age be x years

Then, (x+4)+(4x+4)=43

or 5x=35
or x=7

Answer 2

let the son age be x
and father's age be 4x
after 4 years
son's age=x+4
father's age=4x+4
according to the question,
x+4+4x+4=43
5x+8=43
5x=43-8
5x=35
x=35/5
x=7
son's present age =7
father's present age=7*4=28


hope it will help you mate!!
thank u