Question: Problems 7584. The purpose of these problems is to keep the material fresh in your mind so that you are better prepared for later sections,

Problems 75–84. The purpose of these problems is to keep the material fresh in your mind so that you are better prepared for later sections, a final exam, or subsequent courses such as calculus.

Solve the given system using matrices.3x + y + 2z = 1 2x - 2y + 5z

3x + y + 2z = 1 2x - 2y + 5z = 5 x + 3y + 2z = -9

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