\left( \begin{array} { c c c } { 1 } & { 4 } & { 3 } \\ { 3 } & { 5 } & { - 2 } \\ { 4 } & { 6 } & { 5 } \\ { 5 } & { - 2 } & { 7 } \end{array} \right) \cdot \left( \begin{array} { l } { x _ { 1 } } \\ { x _ { 2 } } \\ { x _ { 3 } } \end{array} \right) = \left( \begin{array} { c } { 5 } \\ { - 15 } \\ { 12 } \\ { 37 } \end{array} \right)
Solve for x_1, x_2, x_3
x_{1}=1
x_{2}=-2
x_{3}=4
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