Whakaoti i te {l}{2300x+1200y=1880}{2300x*100+1200*80/100=18780}

$$\left. \begin{array} { l } { 2300 x + 1200 y = 1880 } \\ { 2300 x \times 100 + 1200 \times \frac { 80 } { 100 } = 18780 } \end{array} \right.$$

Whakaoti mō x, y

$$x=\frac{891}{11500}\approx 0.077478261$$

$$y = \frac{8509}{6000} = 1\frac{2509}{6000} \approx 1.418166667$$

Ngā Upane Otinga

Whakaarohia te whārite tuarua. Whakareatia te 2300 ki te 100, ka 230000.

$$230000x+1200\times \frac{80}{100}=18780$$

Whakahekea te hautanga \frac{80}{100} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 20.

$$230000x+1200\times \frac{4}{5}=18780$$

Whakareatia te 1200 ki te \frac{4}{5}, ka 960.

$$230000x+960=18780$$

Tangohia te 960 mai i ngā taha e rua.

$$230000x=18780-960$$

Tangohia te 960 i te 18780, ka 17820.

$$230000x=17820$$

Whakawehea ngā taha e rua ki te 230000.

$$x=\frac{17820}{230000}$$

Whakahekea te hautanga \frac{17820}{230000} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 20.

$$x=\frac{891}{11500}$$

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

$$2300\times \frac{891}{11500}+1200y=1880$$

Whakareatia te 2300 ki te \frac{891}{11500}, ka \frac{891}{5}.

$$\frac{891}{5}+1200y=1880$$

Tangohia te \frac{891}{5} mai i ngā taha e rua.

$$1200y=1880-\frac{891}{5}$$

Tangohia te \frac{891}{5} i te 1880, ka \frac{8509}{5}.

$$1200y=\frac{8509}{5}$$

Whakawehea ngā taha e rua ki te 1200.

$$y=\frac{\frac{8509}{5}}{1200}$$

Tuhia te \frac{\frac{8509}{5}}{1200} hei hautanga kotahi.

$$y=\frac{8509}{5\times 1200}$$

Whakareatia te 5 ki te 1200, ka 6000.

$$y=\frac{8509}{6000}$$

Kua oti te pūnaha te whakatau.

$$x=\frac{891}{11500} y=\frac{8509}{6000}$$