Whakaoti i te {l}{y+x-xy=0}{-4-x+1=0}

$$\left\{ \begin{array} { l } { y + x - x y = 0 } \\ { - 4 - x + 1 = 0 } \end{array} \right.$$

Whakaoti mō y, x

$$x=-3$$

$$y=\frac{3}{4}=0.75$$

Ngā Upane Otinga

Whakaarohia te whārite tuarua. Tāpirihia te -4 ki te 1, ka -3.

$$-3-x=0$$

Me tāpiri te 3 ki ngā taha e rua. Ko te tau i tāpiria he kore ka hua koia tonu.

$$-x=3$$

Whakawehea ngā taha e rua ki te -1.

$$x=-3$$

Whakaarohia te whārite tuatahi. Me kōkuhu ngā uara tāupe mōhiotia ki te whārite.

$$y-3-\left(-3y\right)=0$$

Whakareatia te -1 ki te -3, ka 3.

$$y-3+3y=0$$

Pahekotia te y me 3y, ka 4y.

$$4y-3=0$$

Me tāpiri te 3 ki ngā taha e rua. Ko te tau i tāpiria he kore ka hua koia tonu.

$$4y=3$$

Whakawehea ngā taha e rua ki te 4.

$$y=\frac{3}{4}$$

Kua oti te pūnaha te whakatau.

$$y=\frac{3}{4} x=-3$$