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Give the following system of linear equations: {[-21x_(1)-73x_(2)=-9],[69x_(2)-28x_(3)=45],[39x_(1)-58x_(3)=-81]:} in matrix form: Ax=b Longleftrightarrow([◻,],[◻,,],[◻])*([x_(1)],[x_(2)],[x_(3)])=([◻],[◻]:}

Give the following system of linear equations:\newline{−21x1−73x2amp;=−969x2−28x3amp;=4539x1−58x3amp;=−81 \left\{\begin{aligned} -21 x_{1}-73 x_{2} & =-9 \\ 69 x_{2}-28 x_{3} & =45 \\ 39 x_{1}-58 x_{3} & =-81 \end{aligned}\right. \newlinein matrix form:\newlineAx=b⟺(□amp;□amp;amp;□)⋅(x1x2x3)=(□□ \boldsymbol{A} \boldsymbol{x}=\boldsymbol{b} \Longleftrightarrow\left(\begin{array}{c|c|c} \square & \\ \square & & \\ \square \end{array}\right) \cdot\left(\begin{array}{l} x_{1} \\ x_{2} \\ x_{3} \end{array}\right)=\left(\begin{array}{l} \square \\ \square \\ \hline \end{array}\right.

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