Whakaoti i te 2*0.2*10/1000=1*0.0025+1*0.1x/1000

$$2 \cdot 0.2 \times \frac{ 10 }{ 1000 } = 1 \times 0.0025+1 \cdot 0.1 \frac{ x }{ 1000 }$$

Whakaoti mō x

$$x=15$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Whakareatia ngā taha e rua o te whārite ki te 1000.

$$2\times 0.2\times 10=1000\times 0.0025+1\times 0.1x$$

Whakareatia te 2 ki te 0.2, ka 0.4.

$$0.4\times 10=1000\times 0.0025+1\times 0.1x$$

Whakareatia te 0.4 ki te 10, ka 4.

$$4=1000\times 0.0025+1\times 0.1x$$

Whakareatia te 1000 ki te 0.0025, ka 2.5.

$$4=2.5+1\times 0.1x$$

Whakareatia te 1 ki te 0.1, ka 0.1.

$$4=2.5+0.1x$$

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

$$2.5+0.1x=4$$

Tangohia te 2.5 mai i ngā taha e rua.

$$0.1x=4-2.5$$

Tangohia te 2.5 i te 4, ka 1.5.

$$0.1x=1.5$$

Whakawehea ngā taha e rua ki te 0.1.

$$x=\frac{1.5}{0.1}$$

Whakarohaina te \frac{1.5}{0.1} mā te whakarea i te taurunga me te tauraro ki te 10. Ka whakawehea he tau ki te tahi, hua ai ko ia anō.

$$x=15$$