My father is four times as old as me. In 20 years, he will be only twice as old as me How is my father and how old am l?
I got that you are
Let us call the age of your father
we have, substituting the first into the second:
I am currently 10 years old and my father is currently 40 years old.
Let's let my age be
So right now my father's age, Let's call it
So in 20 years I will be
So my age is currently 10 years old.
Substituting 10 for
I am 10 years old now and and my father is 40.
Although we are dealing with the ages of two people, we only need to use one variable, because we know how their ages are connected.
Let my present age be
In 20 years time
My age will be
Then, twice my age will be the same as my father's age.
"2 x younger age = older age"
Do not make the mistake of doubling the father's age!