Matrizengleichung

## LGS in Matrizengleichung umschreiben

$$\begin{array}{l}[1]\cdot [x_1]+[2]\cdot [x_2]=[20]\\ [3]\cdot [x_1]+[1]\cdot [x_2]=[17]\end{array}\}$$

Matrizengleichung

$$\left(\begin{array}{cc}[1]& [2]\\ [3]& [1]\end{array}\right)\cdot \left(\begin{array}{c}[x_1]\\ [x_2]\end{array}\right)=\left(\begin{array}{c}[20]\\ [17]\end{array}\right)$$