Question

Mira's age after two years will be twice her present age, what is her present age?

Answer 1

We don't know the present age of Mira, so let us consider it as a variable 'a'.
Her age after 2 years = a + 2
We are given that after two years, her age will be twice her present age.
So, her age after 2 years = a $\times$ 2 = 2a
It means, (a + 2) = 2a.
So, a = 2.
Therefore, the present age of Mira is 2 years.