Use Cramer's rule to solve the system of equations. If D = 0, use another method to determine the solution set.
-$$\begin{array} { l }
- 7 x - 7 y = 14 \
- 4 x - 4 y = 8
\end{array}$$
A) $\{ ( - 2,0 ) \}$
B) $\{ ( - 2,1 ) \}$
C) $\{ ( - 3,1 ) \}$
D) Cramer's rule does not apply since $D = 0$; $\varnothing$

Question

Use Cramer's rule to solve the system of equations. If D = 0, use another method to determine the solution set.
-$$\begin{array} { l } 
- 7 x - 7 y = 14 \
- 4 x - 4 y = 8
\end{array}$$
A) $\{ ( - 2,0 ) \}$
B) $\{ ( - 2,1 ) \}$
C) $\{ ( - 3,1 ) \}$
D) Cramer's rule does not apply since $D = 0$; $\varnothing$

Quizplus · Accepted Answer

Cramer's rule applies since $D \neq 0$.

Use Cramer's Rule to Solve the System of Equations −7x−7y=14−4x−4y=8\begin{array} { l } - 7 x - 7 y = 14 \\- 4 x - 4 y = 8\end{array}−7x−7y=14−4x−4y=8​

Use Cramer's Rule to Solve the System of Equations $\begin{array} { l } - 7 x - 7 y = 14 \\- 4 x - 4 y = 8\end{array}$