Whakaoti i te 2.8=a*2*2+b*2+3

$$2.8 = a \times 2 \times 2 + b \times 2 + 3$$

Whakaoti mō a

$$a=-\frac{b}{2}-0.05$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Whakareatia te 2 ki te 2, ka 4.

$$2.8=a\times 4+b\times 2+3$$

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

$$a\times 4+b\times 2+3=2.8$$

Tangohia te b\times 2 mai i ngā taha e rua.

$$a\times 4+3=2.8-b\times 2$$

Tangohia te 3 mai i ngā taha e rua.

$$a\times 4=2.8-b\times 2-3$$

Whakareatia te -1 ki te 2, ka -2.

$$a\times 4=2.8-2b-3$$

Tangohia te 3 i te 2.8, ka -0.2.

$$a\times 4=-0.2-2b$$

He hanga arowhānui tō te whārite.

$$4a=-2b-0.2$$

Whakawehea ngā taha e rua ki te 4.

$$\frac{4a}{4}=\frac{-2b-0.2}{4}$$

Mā te whakawehe ki te 4 ka wetekia te whakareanga ki te 4.

$$a=\frac{-2b-0.2}{4}$$

Whakawehe -0.2-2b ki te 4.

$$a=-\frac{b}{2}-\frac{1}{20}$$

Whakaoti mō b

$$b=-2a-0.1$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Whakareatia te 2 ki te 2, ka 4.

$$2.8=a\times 4+b\times 2+3$$

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

$$a\times 4+b\times 2+3=2.8$$

Tangohia te a\times 4 mai i ngā taha e rua.

$$b\times 2+3=2.8-a\times 4$$

Tangohia te 3 mai i ngā taha e rua.

$$b\times 2=2.8-a\times 4-3$$

Whakareatia te -1 ki te 4, ka -4.

$$b\times 2=2.8-4a-3$$

Tangohia te 3 i te 2.8, ka -0.2.

$$b\times 2=-0.2-4a$$

He hanga arowhānui tō te whārite.

$$2b=-4a-0.2$$

Whakawehea ngā taha e rua ki te 2.

$$\frac{2b}{2}=\frac{-4a-0.2}{2}$$

Mā te whakawehe ki te 2 ka wetekia te whakareanga ki te 2.

$$b=\frac{-4a-0.2}{2}$$

Whakawehe -0.2-4a ki te 2.

$$b=-2a-\frac{1}{10}$$