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Solve the System by Using the Inverse of the Coefficient x+3y=−821x+6y=3\begin{array} { r } x + 3 y = - 8 \\21 x + 6 y = 3\end{array}

Question 403

Multiple Choice

Solve the system by using the inverse of the coefficient matrix.
- x+3y=−821x+6y=3\begin{array} { r } x + 3 y = - 8 \\21 x + 6 y = 3\end{array}


A) {(−3,1) }\{ ( - 3,1 ) \}
B) {(3,−1) }\{ ( 3 , - 1 ) \}
C) {(−1,3) }\{ ( - 1,3 ) \}
D) {(1,−3) }\{ ( 1 , - 3 ) \}

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