Solve the system by using the inverse of the coefficient matrix.
-$$\begin{array} { c }
5 x + 4 y = 8 \
4 x - 2 y = 22
\end{array}$$
A) $\{ ( - 3,4 ) \}$
B) $\{ ( 4 , - 3 ) \}$
C) $\{ ( 3 , - 4 ) \}$
D) $\{ ( - 4,3 ) \}$

Question

Solve the system by using the inverse of the coefficient matrix.
-$$\begin{array} { c } 
5 x + 4 y = 8 \
4 x - 2 y = 22
\end{array}$$
A) $\{ ( - 3,4 ) \}$
B) $\{ ( 4 , - 3 ) \}$
C) $\{ ( 3 , - 4 ) \}$
D) $\{ ( - 4,3 ) \}$

Quizplus · Accepted Answer

The inverse of the coefficient matrix is used to solve the system, resulting in the solution (4, -3).

Solve the System by Using the Inverse of the Coefficient 5x+4y=84x−2y=22\begin{array} { c } 5 x + 4 y = 8 \\4 x - 2 y = 22\end{array}5x+4y=84x−2y=22​

Solve the System by Using the Inverse of the Coefficient $\begin{array} { c } 5 x + 4 y = 8 \\4 x - 2 y = 22\end{array}$