Whakaoti i te (1+30%)x=39

$$(1+30 \% )x=39$$

Whakaoti mō x

$$x=30$$

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.

$$\left(1+\frac{3}{10}\right)x=39$$

Me tahuri te 1 ki te hautau \frac{10}{10}.

$$\left(\frac{10}{10}+\frac{3}{10}\right)x=39$$

Tā te mea he rite te tauraro o \frac{10}{10} me \frac{3}{10}, me tāpiri rāua mā te tāpiri i ō raua taurunga.

$$\frac{10+3}{10}x=39$$

Tāpirihia te 10 ki te 3, ka 13.

$$\frac{13}{10}x=39$$

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

$$x=39\times \frac{10}{13}$$

Tuhia te 39\times \frac{10}{13} hei hautanga kotahi.

$$x=\frac{39\times 10}{13}$$

Whakareatia te 39 ki te 10, ka 390.

$$x=\frac{390}{13}$$

Whakawehea te 390 ki te 13, kia riro ko 30.

$$x=30$$