Answer:
-10
Explanation:
We must write an equation
X is the number that we need to find
X - 10 = 2X
To solve this equation, we must substract x from each side
x-10-x = 2x - x
This results in
-10 = X
So the answer is -10
The events are in this order as occured in the world history;
1) Sepoy Rebellion (This is also known as Indian Mutiny, the Great Rebellion, the Revolt of 1857 etc. and was the first major uprising against East India Company and reportedly set path for the establishment of British Raj in India)
2) British Raj established. (1858)
3) World War 1 (1914)
4) Amritsar Massacre (1919) (This is also known in Indian History as The Jallianwala Bagh massacre)
The monsoons come each season on a regular pattern.