Whakaoti i te (13x*30+13x*08*20)div50=1

$$(13x \times 30+13x \times 08 \times 20) \div 50=1$$

Whakaoti mō x

$$x=\frac{5}{39}\approx 0.128205128$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Me whakarea ngā taha e rua ki te 50.

$$13x\times 30+13x\times 0\times 8\times 20=50$$

Whakareatia te 13 ki te 30, ka 390.

$$390x+13x\times 0\times 8\times 20=50$$

Whakareatia te 13 ki te 0, ka 0.

$$390x+0x\times 8\times 20=50$$

Whakareatia te 0 ki te 8, ka 0.

$$390x+0x\times 20=50$$

Whakareatia te 0 ki te 20, ka 0.

$$390x+0x=50$$

Ko te tau i whakarea ki te kore ka hua ko te kore.

$$390x+0=50$$

Ko te tau i tāpiria he kore ka hua koia tonu.

$$390x=50$$

Whakawehea ngā taha e rua ki te 390.

$$x=\frac{50}{390}$$

Whakahekea te hautanga \frac{50}{390} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 10.

$$x=\frac{5}{39}$$