Whakaoti i te 50*0.98=(50+x)*0.2

$$50 \times 0.98=(50+x) \times 0.2$$

Whakaoti mō x

$$x=195$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Whakareatia te 50 ki te 0.98, ka 49.

$$49=\left(50+x\right)\times 0.2$$

Whakamahia te āhuatanga tohatoha hei whakarea te 50+x ki te 0.2.

$$49=10+0.2x$$

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

$$10+0.2x=49$$

Tangohia te 10 mai i ngā taha e rua.

$$0.2x=49-10$$

Tangohia te 10 i te 49, ka 39.

$$0.2x=39$$

Whakawehea ngā taha e rua ki te 0.2.

$$x=\frac{39}{0.2}$$

Whakarohaina te \frac{39}{0.2} mā te whakarea i te taurunga me te tauraro ki te 10.

$$x=\frac{390}{2}$$

Whakawehea te 390 ki te 2, kia riro ko 195.

$$x=195$$