Whakaoti i te 180-180-75-x/2+180-2x/2=180

$$\frac{ 180-180-75-x }{ 2 } + \frac{ 180-2x }{ 2 } = 180$$

Whakaoti mō x

$$x=-85$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Whakareatia ngā taha e rua o te whārite ki te 2.

$$180-180-75-x+180-2x=360$$

Tangohia te 180 i te 180, ka 0.

$$-75-x+180-2x=360$$

Tāpirihia te -75 ki te 180, ka 105.

$$105-x-2x=360$$

Pahekotia te -x me -2x, ka -3x.

$$105-3x=360$$

Tangohia te 105 mai i ngā taha e rua.

$$-3x=360-105$$

Tangohia te 105 i te 360, ka 255.

$$-3x=255$$

Whakawehea ngā taha e rua ki te -3.

$$x=\frac{255}{-3}$$

Whakawehea te 255 ki te -3, kia riro ko -85.

$$x=-85$$