Whakaoti i te 0.8*x+0.2*y=3

$$0.8 \times x+0.2 \times y=3$$

Whakaoti mō x

$$x=\frac{15-y}{4}$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Tangohia te 0.2y mai i ngā taha e rua.

$$0.8x=3-0.2y$$

He hanga arowhānui tō te whārite.

$$0.8x=-\frac{y}{5}+3$$

Whakawehea ngā taha e rua o te whārite ki te 0.8, he ōrite ki te whakarea i ngā taha e rua ki te tau huripoki o te hautanga.

$$\frac{0.8x}{0.8}=\frac{-\frac{y}{5}+3}{0.8}$$

Mā te whakawehe ki te 0.8 ka wetekia te whakareanga ki te 0.8.

$$x=\frac{-\frac{y}{5}+3}{0.8}$$

Whakawehe 3-\frac{y}{5} ki te 0.8 mā te whakarea 3-\frac{y}{5} ki te tau huripoki o 0.8.

$$x=\frac{15-y}{4}$$

Whakaoti mō y

$$y=15-4x$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Tangohia te 0.8x mai i ngā taha e rua.

$$0.2y=3-0.8x$$

He hanga arowhānui tō te whārite.

$$0.2y=-\frac{4x}{5}+3$$

Me whakarea ngā taha e rua ki te 5.

$$\frac{0.2y}{0.2}=\frac{-\frac{4x}{5}+3}{0.2}$$

Mā te whakawehe ki te 0.2 ka wetekia te whakareanga ki te 0.2.

$$y=\frac{-\frac{4x}{5}+3}{0.2}$$

Whakawehe 3-\frac{4x}{5} ki te 0.2 mā te whakarea 3-\frac{4x}{5} ki te tau huripoki o 0.2.

$$y=15-4x$$