Whakaoti i te 20/100+x=0.15

$$\frac { 20 } { 100 + x } = 0.15$$

Whakaoti mō x

$$x = \frac{100}{3} = 33\frac{1}{3} \approx 33.333333333$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Tē taea kia ōrite te tāupe x ki -100 nā te kore tautuhi i te whakawehenga mā te kore. Whakareatia ngā taha e rua o te whārite ki te x+100.

$$20=0.15\left(x+100\right)$$

Whakamahia te āhuatanga tohatoha hei whakarea te 0.15 ki te x+100.

$$20=0.15x+15$$

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

$$0.15x+15=20$$

Tangohia te 15 mai i ngā taha e rua.

$$0.15x=20-15$$

Tangohia te 15 i te 20, ka 5.

$$0.15x=5$$

Whakawehea ngā taha e rua ki te 0.15.

$$x=\frac{5}{0.15}$$

Whakarohaina te \frac{5}{0.15} mā te whakarea i te taurunga me te tauraro ki te 100.

$$x=\frac{500}{15}$$

Whakahekea te hautanga \frac{500}{15} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 5.

$$x=\frac{100}{3}$$