Whakaoti i te 80(12)+120(x)+500(2/3(12))-35000=0

$$80(12)+120(x)+500( \frac{ 2 }{ 3 } (12))-35000=0$$

Whakaoti mō x

$$x = \frac{751}{3} = 250\frac{1}{3} \approx 250.333333333$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Whakareatia te 80 ki te 12, ka 960.

$$960+120x+500\times \frac{2}{3}\times 12-35000=0$$

Tuhia te 500\times \frac{2}{3} hei hautanga kotahi.

$$960+120x+\frac{500\times 2}{3}\times 12-35000=0$$

Whakareatia te 500 ki te 2, ka 1000.

$$960+120x+\frac{1000}{3}\times 12-35000=0$$

Tuhia te \frac{1000}{3}\times 12 hei hautanga kotahi.

$$960+120x+\frac{1000\times 12}{3}-35000=0$$

Whakareatia te 1000 ki te 12, ka 12000.

$$960+120x+\frac{12000}{3}-35000=0$$

Whakawehea te 12000 ki te 3, kia riro ko 4000.

$$960+120x+4000-35000=0$$

Tāpirihia te 960 ki te 4000, ka 4960.

$$4960+120x-35000=0$$

Tangohia te 35000 i te 4960, ka -30040.

$$-30040+120x=0$$

Me tāpiri te 30040 ki ngā taha e rua. Ko te tau i tāpiria he kore ka hua koia tonu.

$$120x=30040$$

Whakawehea ngā taha e rua ki te 120.

$$x=\frac{30040}{120}$$

Whakahekea te hautanga \frac{30040}{120} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 40.

$$x=\frac{751}{3}$$