Whakaoti i te -4x+15*4*2-225*2=0

$$-4x+15 \times 4 \times 2-225 \times 2=0$$

Whakaoti mō x

$$x = -\frac{165}{2} = -82\frac{1}{2} = -82.5$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Whakareatia te 15 ki te 4, ka 60.

$$-4x+60\times 2-225\times 2=0$$

Whakareatia te 60 ki te 2, ka 120.

$$-4x+120-225\times 2=0$$

Whakareatia te 225 ki te 2, ka 450.

$$-4x+120-450=0$$

Tangohia te 450 i te 120, ka -330.

$$-4x-330=0$$

Me tāpiri te 330 ki ngā taha e rua. Ko te tau i tāpiria he kore ka hua koia tonu.

$$-4x=330$$

Whakawehea ngā taha e rua ki te -4.

$$x=\frac{330}{-4}$$

Whakahekea te hautanga \frac{330}{-4} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 2.

$$x=-\frac{165}{2}$$