Whakaoti i te -89=1+(n-1)*(-2)

$$-89 = 1+(n-1) \times (-2)$$

Whakaoti mō n

$$n=46$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Whakamahia te āhuatanga tohatoha hei whakarea te n-1 ki te -2.

$$-89=1-2n+2$$

Tāpirihia te 1 ki te 2, ka 3.

$$-89=3-2n$$

Whakawhitihia ngā taha kia puta ki te taha mauī ngā kīanga tau taurangi katoa.

$$3-2n=-89$$

Tangohia te 3 mai i ngā taha e rua.

$$-2n=-89-3$$

Tangohia te 3 i te -89, ka -92.

$$-2n=-92$$

Whakawehea ngā taha e rua ki te -2.

$$n=\frac{-92}{-2}$$

Whakawehea te -92 ki te -2, kia riro ko 46.

$$n=46$$