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Find a Solution of the System of Equations and Verify {8x+3y=203x5y=9\left\{ \begin{array} { r } - 8 x + 3 y = 20 \\3 x - 5 y = - 9\end{array} \right.

Question 115

Multiple Choice

Find a solution of the system of equations and verify your result using matrix multiplication.
{8x+3y=203x5y=9\left\{ \begin{array} { r } - 8 x + 3 y = 20 \\3 x - 5 y = - 9\end{array} \right.


A) [38173]\left[ \begin{array} { r } - \frac { 3 } { 8 } \\ \frac { 17 } { 3 } \end{array} \right]
B) [65384019]\left[ \begin{array} { r } - \frac { 65 } { 38 } \\ \frac { 40 } { 19 } \end{array} \right]
C) [734913249]\left[ \begin{array} { r } - \frac { 73 } { 49 } \\ \frac { 132 } { 49 } \end{array} \right]
D) [73311231]\left[ \begin{array} { r } - \frac { 73 } { 31 } \\ \frac { 12 } { 31 } \end{array} \right]
E) [31733112]\left[ \begin{array} { r } - \frac { 31 } { 73 } \\ \frac { 31 } { 12 } \end{array} \right]

Correct Answer:

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