Solve the System of Equations by Using the Inverse of the Coefficient

question 109

Multiple Choice

Solve the system of equations by using the inverse of the coefficient matrix if it exists and by the echelon method if the
inverse doesn't exist.
- $$\begin{array}{l}-3 x+9 y=9 \\3 x+2 y=13\end{array}$$

• A) \( (3,2) \)
• B) \( (-3,-2) \)
• C) \( (-2,-3) \)
• D) \( (2,3) \)

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