X liters of mixture contain milk and water. Water is 20% in the mixture.…

X liters of mixture contain milk and water. Water is 20% in the mixture. Follow the steps one after another in the given order.
I. b liters of water is added, and the percentage of water in the mixture becomes 25%.
II. b liters of mixture is removed.
III. 1.5b liters of milk are added.
Find the final quantity of the mixture after completing these three steps.