Explain superposition theorem

Superposition states in any linear multiple source network the resultant current in any branch is the algebraic sum of current that would be produced by each source acting separately. It can also be described as in any linear, active, bilateral network having more than one source, the response across any element is the sum of the responses obtained from each source considered separately and all other sources are replaced by their internal resistance. The superposition theorem is used to solve the network where two or more sources are present and connected.