Whakaoti i te 180-(x-20)=x

$$180 - ( x - 20 ) = x$$

Whakaoti mō x

$$x=100$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Hei kimi i te tauaro o x-20, kimihia te tauaro o ia taurangi.

$$180-x-\left(-20\right)=x$$

Ko te tauaro o -20 ko 20.

$$180-x+20=x$$

Tāpirihia te 180 ki te 20, ka 200.

$$200-x=x$$

Tangohia te x mai i ngā taha e rua.

$$200-x-x=0$$

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

$$200-2x=0$$

Tangohia te 200 mai i ngā taha e rua. Ko te tau i tango i te kore ka hua ko tōna korenga.

$$-2x=-200$$

Whakawehea ngā taha e rua ki te -2.

$$x=\frac{-200}{-2}$$

Whakawehea te -200 ki te -2, kia riro ko 100.

$$x=100$$