Question

After five years the age of father will be three times the age of his son
(i)Write the linear equation in two variables to represent this
(ii) What is the age of son when the father is 70 years old?​

Answer 1

Answer:

Step-by-step explanation:

Let father's present age be y and that of child be x

(i) y + 5 = 3(x + 5)

  y + 5 = 3x + 15

  y = 3x + 10....(1)

(ii) So according to the question age of y (father) is given as 70

   Plugging value of y in equation 1 we get

   70 = 3x + 10

   70 - 10 = 3x

   60 = 3x

   x = 60 / 3

   x = 20