Use a Calculator That Can Perform Matrix Operations to Solve $\left\{ \begin{array} { l } x + 4 y + 7 z = 10 \\2 x + 5 y + 8 z = 11 \\3 x + 6 y - 9 z = 12\end{array} \right.$

question 74

Essay

Use a calculator that can perform matrix operations to solve the system. $\left\{ \begin{array} { l } x + 4 y + 7 z = 10 \\2 x + 5 y + 8 z = 11 \\3 x + 6 y - 9 z = 12\end{array} \right.$

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