Question

Father is four times as old as his son today.The age of father at the birth of his son was 30 years. Find their present ages

Answer 1

Answer:

father is 30 years old at the birth of his son

let's take present age of son=x

so the present age of father=30+x

$4x = 30 + x \\ 4x - x = 30 \\ 3x = 30 \\ x = \frac{30}{3} = 10$

present age of son =10

present age of father=30+10=40

Step-by-step explanation:

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Answer 2

Answer:

let the present age. of son = x

let the present age of father =4x

According to question

The age of the father at the time of the birth of his son was 30.

The equation becomes,

4x -x = 30

3x =30

x = 10

therefore present age of son is 10 years and father is 4x = 4*10= 40 years