Sohani says that in two years' she will be twice as old as she was four years ago. How old is Sohani now?

Let Sohani is x years old now.
According to the question,
$x+2=(x-4)\times 2$
$$\begin{gathered} x+2=2x-8 \\ x=10 \end{gathered}$$
So, Sohani is 10 years old now.