Whakaoti i te {l}{3.4x=(x+4)-40}{x+y=80}

$$\left. \begin{array} { l } { 3.4 x = ( x + 4 ) - 40 } \\ { x + y = 80 } \end{array} \right.$$

Whakaoti mō x, y

$$x=-15$$

$$y=95$$

Ngā Upane Otinga

Whakaarohia te whārite tuatahi. Tangohia te 40 i te 4, ka -36.

$$3.4x=x-36$$

Tangohia te x mai i ngā taha e rua.

$$3.4x-x=-36$$

Pahekotia te 3.4x me -x, ka 2.4x.

$$2.4x=-36$$

Whakawehea ngā taha e rua ki te 2.4.

$$x=\frac{-36}{2.4}$$

Whakarohaina te \frac{-36}{2.4} mā te whakarea i te taurunga me te tauraro ki te 10.

$$x=\frac{-360}{24}$$

Whakawehea te -360 ki te 24, kia riro ko -15.

$$x=-15$$

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

$$-15+y=80$$

Me tāpiri te 15 ki ngā taha e rua.

$$y=80+15$$

Tāpirihia te 80 ki te 15, ka 95.

$$y=95$$

Kua oti te pūnaha te whakatau.

$$x=-15 y=95$$