Use matrices to solve: $\left\{ \begin{array} { l }
4 a - 2 b + 6 c - 7 d = - 91 \
9 a + 6 b - 7 c - 5 d = - 28 \
8 a - 5 b + 2 c - 4 d = - 4 \
2 a - 4 b - 2 c + 3 d = 77
\end{array} \right.$

Question

Use matrices to solve: $\left\{ \begin{array} { l } 
4 a - 2 b + 6 c - 7 d = - 91 \
9 a + 6 b - 7 c - 5 d = - 28 \
8 a - 5 b + 2 c - 4 d = - 4 \
2 a - 4 b - 2 c + 3 d = 77
\end{array} \right.$

Quizplus · Accepted Answer

The Answer of Use matrices to solve: $\left\{ \begin{array} { l } 
4 a - 2 b + 6 c - 7 d = - 91 \
9 a + 6 b - 7 c - 5 d = - 28 \
8 a - 5 b + 2 c - 4 d = - 4 \
2 a - 4 b - 2 c + 3 d = 77
\end{array} \right.$

Use Matrices to Solve