Whakaoti i te (1.3x*30+1.3x*0.8*20)div50=1

$$(1.3x \times 30+1.3x \times 0.8 \times 20) \div 50=1$$

Whakaoti mō x

$$x=\frac{250}{299}\approx 0.836120401$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Me whakarea ngā taha e rua ki te 50.

$$1.3x\times 30+1.3x\times 0.8\times 20=50$$

Whakareatia te 1.3 ki te 30, ka 39.

$$39x+1.3x\times 0.8\times 20=50$$

Whakareatia te 1.3 ki te 0.8, ka 1.04.

$$39x+1.04x\times 20=50$$

Whakareatia te 1.04 ki te 20, ka 20.8.

$$39x+20.8x=50$$

Pahekotia te 39x me 20.8x, ka 59.8x.

$$59.8x=50$$

Whakawehea ngā taha e rua ki te 59.8.

$$x=\frac{50}{59.8}$$

Whakarohaina te \frac{50}{59.8} mā te whakarea i te taurunga me te tauraro ki te 10.

$$x=\frac{500}{598}$$

Whakahekea te hautanga \frac{500}{598} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 2.

$$x=\frac{250}{299}$$