Ordner likningene

$$\left[\begin{array}{ccc}y& =& x-1\\ y& =& \frac{2}{3}x+\frac{2}{3}\end{array}\right]$$

Løsning

$$\begin{gathered} x=5 \\ y=4 \end{gathered}$$

Ordner likningene

$$\begin{gathered} \left[\begin{array}{r}2y=-\frac{3}{2}x+\frac{5}{2}\\ 2x-\frac{1}{2}y=-3\end{array}\right] \\ \left[\begin{array}{r}y=-\frac{3}{4}x+\frac{5}{4}\\ y=4x+6\end{array}\right] \end{gathered}$$

Løsning

$$\begin{gathered} x=-1 \\ y=2 \end{gathered}$$

Ordner likningene

$$\left[\begin{array}{c}80y=60x+40\\ -3y=-2x-2\end{array}\right]$$

$$\left[\begin{array}{c}y=\frac{3}{4}x+\frac{1}{2}\\ y=\frac{2}{3}x+\frac{2}{3}\end{array}\right]$$

Løsning

$$\begin{gathered} x=2 \\ y=2 \end{gathered}$$

Ordner likningene

$$\left[\begin{array}{c}3y=-\frac{3}{5}x+6\\ y=2x-20\end{array}\right]$$

$$\left[\begin{array}{c}y=-\frac{1}{5}x+2\\ y=2x-20\end{array}\right]$$

Løsning

$$\begin{gathered} x=10 \\ y=0 \end{gathered}$$

Vi får løsningen $$x=\frac{9}{4}\wedge y=\frac{23}{8}$$

Vi får løsningen $$s=2,2 \wedge t=1,8$$