Whakaoti i te 0.5+0.75(100-x)=0.60(100)

$$0.5+0.75(100-x)=0.60(100)$$

Whakaoti mō x

$$x = \frac{62}{3} = 20\frac{2}{3} \approx 20.666666667$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Whakamahia te āhuatanga tohatoha hei whakarea te 0.75 ki te 100-x.

$$0.5+75-0.75x=0.6\times 100$$

Tāpirihia te 0.5 ki te 75, ka 75.5.

$$75.5-0.75x=0.6\times 100$$

Whakareatia te 0.6 ki te 100, ka 60.

$$75.5-0.75x=60$$

Tangohia te 75.5 mai i ngā taha e rua.

$$-0.75x=60-75.5$$

Tangohia te 75.5 i te 60, ka -15.5.

$$-0.75x=-15.5$$

Whakawehea ngā taha e rua ki te -0.75.

$$x=\frac{-15.5}{-0.75}$$

Whakarohaina te \frac{-15.5}{-0.75} mā te whakarea i te taurunga me te tauraro ki te 100.

$$x=\frac{-1550}{-75}$$

Whakahekea te hautanga \frac{-1550}{-75} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te -25.

$$x=\frac{62}{3}$$