Whakaoti i te 168=2(n+10)*4+n*10

$$168 = 2 ( n + 10 ) \times 4 + n \times 10$$

Whakaoti mō n

$$n = \frac{44}{9} = 4\frac{8}{9} \approx 4.888888889$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Whakareatia te 2 ki te 4, ka 8.

$$168=8\left(n+10\right)+n\times 10$$

Whakamahia te āhuatanga tohatoha hei whakarea te 8 ki te n+10.

$$168=8n+80+n\times 10$$

Pahekotia te 8n me n\times 10, ka 18n.

$$168=18n+80$$

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

$$18n+80=168$$

Tangohia te 80 mai i ngā taha e rua.

$$18n=168-80$$

Tangohia te 80 i te 168, ka 88.

$$18n=88$$

Whakawehea ngā taha e rua ki te 18.

$$n=\frac{88}{18}$$

Whakahekea te hautanga \frac{88}{18} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 2.

$$n=\frac{44}{9}$$