Solve the following set of equations graphically: 
Definitions:
Marginal Revenue
The profit increase achieved by selling one additional unit of a product or service.
Marginal Cost
The incremental cost involved in producing an additional unit of a good or service.
Marginal Revenue
The financial gain a firm acquires from the sale of an extra unit of a product or service.
Surround Sound Systems
Audio systems designed to immerse the listener in a rich and directional sound experience by using multiple speakers placed around the environment.
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