Whakaoti i te 78=1/2x(64+13)

$$78= \frac{ 1 }{ 2 } x(64+13)$$

Whakaoti mō x

$$x = \frac{156}{77} = 2\frac{2}{77} \approx 2.025974026$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Tāpirihia te 64 ki te 13, ka 77.

$$78=\frac{1}{2}x\times 77$$

Whakareatia te \frac{1}{2} ki te 77, ka \frac{77}{2}.

$$78=\frac{77}{2}x$$

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

$$\frac{77}{2}x=78$$

Me whakarea ngā taha e rua ki te \frac{2}{77}, te tau utu o \frac{77}{2}.

$$x=78\times \frac{2}{77}$$

Tuhia te 78\times \frac{2}{77} hei hautanga kotahi.

$$x=\frac{78\times 2}{77}$$

Whakareatia te 78 ki te 2, ka 156.

$$x=\frac{156}{77}$$