Use matrices to solve the system of equations (if possible).Use Gaussian elimination with back-substitution or Gauss-Jordan elimination. $$\left\{ \begin{aligned}
7 x - 6 y & = - 40 \
- 5 x + 7 y & = 34
\end{aligned} \right.$$
A)x = 4,y = -2
B)x = -4,y = 2
C)x = 2,y = -4
D)x = 2,y = 4
E)no solution

Question

Quizplus · Accepted Answer

Using Gaussian elimination, the system of equations can be transformed to find x = -4 and y = 2.

Use Matrices to Solve the System of Equations (If Possible) {7x−6y=−40−5x+7y=34\left\{ \begin{aligned}7 x - 6 y & = - 40 \\- 5 x + 7 y & = 34\end{aligned} \right.{7x−6y−5x+7y​=−40=34​

Use Matrices to Solve the System of Equations (If Possible) $\left\{ \begin{aligned}7 x - 6 y & = - 40 \\- 5 x + 7 y & = 34\end{aligned} \right.$