Which Method Should Be Used to Solve the System? Explain

question 3

Essay

Which method should be used to solve the system? Explain your answer, including a description of the first step.
-x² + 9y² = 9
7x² + 8y² = 81

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United States Army

The land service branch of the United States Armed Forces, responsible for land-based military operations.

Classical Economics

A school of thought in economics that emphasizes the importance of free markets, competition, and self-regulation of markets based on the supply and demand principle.