Whakaoti i te 60000+(x-1000)*150-390000-200*1200geq75000

$$60000+(x-1000) \times 150-390000-200 \times 1200 \geq 75000$$

Whakaoti mō x

$$x\geq 5300$$

Ngā Upane Otinga

Whakamahia te āhuatanga tohatoha hei whakarea te x-1000 ki te 150.

$$60000+150x-150000-390000-200\times 1200\geq 75000$$

Tangohia te 150000 i te 60000, ka -90000.

$$-90000+150x-390000-200\times 1200\geq 75000$$

Tangohia te 390000 i te -90000, ka -480000.

$$-480000+150x-200\times 1200\geq 75000$$

Whakareatia te 200 ki te 1200, ka 240000.

$$-480000+150x-240000\geq 75000$$

Tangohia te 240000 i te -480000, ka -720000.

$$-720000+150x\geq 75000$$

Me tāpiri te 720000 ki ngā taha e rua.

$$150x\geq 75000+720000$$

Tāpirihia te 75000 ki te 720000, ka 795000.

$$150x\geq 795000$$

Whakawehea ngā taha e rua ki te 150. I te mea he tōrunga te 150, kāore e huri te ahunga koreōrite.

$$x\geq \frac{795000}{150}$$

Whakawehea te 795000 ki te 150, kia riro ko 5300.

$$x\geq 5300$$