Question

The sum of the age of a father and his son is 100 years now.5 years ago their age were in the ratio of 2:1

Answer 1

Let the age of father is x

and the age of his son is y

x+y=100. -1

x-5:y-5=2:1

1(x-5)=2(y-5)

x-5=2y-10

x-2y=-10+5

x-2y=-5. -2

From 1 and 2

x+y=100

X-2y=-5

3y=105

y=35

x=100-y=100-35=65

Thank u,

I hope you understand my solution.