SOLUTION: MR.Ben is 4 times older than his son.The sum of their sges is 45 years.Find the age of his son.

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Question 574538: MR.Ben is 4 times older than his son.The sum of their sges is 45 years.Find the age of his son.
Answer by chana(69) About Me  (Show Source):
You can put this solution on YOUR website!
let son's age=x
so mr.ben age = 4x
The sum of their sges is 45 years
this implies
x + 4x = 45
so son's age , x=9