1.

Solve for x and y if \(\left[ {\begin{array}{*{20}{c}}3&4\\4&{ - 3}\end{array}} \right]\left[ {\begin{array}{*{20}{c}}x\\y\end{array}} \right] = \left[ {\begin{array}{*{20}{c}}7\\1\end{array}} \right]\)

A. x = -1, y = 1
B. x = 1, y = 1
C. x = 1, y = -1
D. None
Answer» C. x = 1, y = -1


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