Superposition Theorem Provides an alternative method for solving linear multisource circuits without the needs for simultaneous equations.
All of the supply sources but one are replaced by their own internal resistance or by a short circuit if the internal resistance is negligible.
The current distribution around the circuit is then solve by using ohms law.
This process is repeated the final current through each component is the Algebraic sum of currents produces when each source acted Alone.
Example of Superposition Theorem