Whakaoti i te x+x*30%=40

$$x + x \cdot 30 \% = 40$$

Whakaoti mō x

$$x = \frac{400}{13} = 30\frac{10}{13} \approx 30.769230769$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Whakahekea te hautanga \frac{30}{100} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 10.

$$x+x\times \frac{3}{10}=40$$

Pahekotia te x me x\times \frac{3}{10}, ka \frac{13}{10}x.

$$\frac{13}{10}x=40$$

Me whakarea ngā taha e rua ki te \frac{10}{13}, te tau utu o \frac{13}{10}.

$$x=40\times \frac{10}{13}$$

Tuhia te 40\times \frac{10}{13} hei hautanga kotahi.

$$x=\frac{40\times 10}{13}$$

Whakareatia te 40 ki te 10, ka 400.

$$x=\frac{400}{13}$$