Whakaoti i te 455=1/2(8+z)7

$$455= \frac{ 1 }{ 2 } (8+z)7$$

Whakaoti mō z

$$z=122$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Whakareatia te \frac{1}{2} ki te 7, ka \frac{7}{2}.

$$455=\frac{7}{2}\left(8+z\right)$$

Whakamahia te āhuatanga tohatoha hei whakarea te \frac{7}{2} ki te 8+z.

$$455=\frac{7}{2}\times 8+\frac{7}{2}z$$

Tuhia te \frac{7}{2}\times 8 hei hautanga kotahi.

$$455=\frac{7\times 8}{2}+\frac{7}{2}z$$

Whakareatia te 7 ki te 8, ka 56.

$$455=\frac{56}{2}+\frac{7}{2}z$$

Whakawehea te 56 ki te 2, kia riro ko 28.

$$455=28+\frac{7}{2}z$$

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

$$28+\frac{7}{2}z=455$$

Tangohia te 28 mai i ngā taha e rua.

$$\frac{7}{2}z=455-28$$

Tangohia te 28 i te 455, ka 427.

$$\frac{7}{2}z=427$$

Me whakarea ngā taha e rua ki te \frac{2}{7}, te tau utu o \frac{7}{2}.

$$z=427\times \frac{2}{7}$$

Tuhia te 427\times \frac{2}{7} hei hautanga kotahi.

$$z=\frac{427\times 2}{7}$$

Whakareatia te 427 ki te 2, ka 854.

$$z=\frac{854}{7}$$

Whakawehea te 854 ki te 7, kia riro ko 122.

$$z=122$$