Solve the system using the elimination method. 
Definitions:
Price Discriminating
A pricing strategy where identical or similar products or services are sold at different prices to different buyers.
Marginal Cost
The outlay involved in generating one more unit of a product.
Buyer's Willingness
The maximum amount a consumer is ready to pay for a good or service, reflecting the value they place on it.
Output Level
The quantity of goods or services produced by a firm or economy at a given time.
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