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.
-$$
\begin{array}{l}
3 x-6 y=-3 \
6 x-12 y=-9
\end{array}
$$
A) No inverse, no solution for system
B) $ (2,2) $
C) $ (-3,-9) $
D) No inverse, $ \left(-1-\frac{1}{2} y, y\right) $

Question

Quizplus · Accepted Answer

The Answer of 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.
-$$
\begin{array}{l}
3 x-6 y=-3 \
6 x-12 y=-9
\end{array}
$$
A) No inverse, no solution for system
B) $ (2,2) $
C) $ (-3,-9) $
D) No inverse, $ \left(-1-\frac{1}{2} y, y\right) $

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