Whakaoti i te .3x7+4x=12.5

$$.3 x 7 + 4 x = 12.5$$

Whakaoti mō x

$$x=-\frac{3x_{7}}{40}+3.125$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Tangohia te 0.3x_{7} mai i ngā taha e rua.

$$4x=12.5-0.3x_{7}$$

He hanga arowhānui tō te whārite.

$$4x=-\frac{3x_{7}}{10}+12.5$$

Whakawehea ngā taha e rua ki te 4.

$$\frac{4x}{4}=\frac{-\frac{3x_{7}}{10}+12.5}{4}$$

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

$$x=\frac{-\frac{3x_{7}}{10}+12.5}{4}$$

Whakawehe 12.5-\frac{3x_{7}}{10} ki te 4.

$$x=-\frac{3x_{7}}{40}+\frac{25}{8}$$

Whakaoti mō x_7

$$x_{7}=\frac{125-40x}{3}$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Tangohia te 4x mai i ngā taha e rua.

$$0.3x_{7}=12.5-4x$$

Whakawehea ngā taha e rua o te whārite ki te 0.3, he ōrite ki te whakarea i ngā taha e rua ki te tau huripoki o te hautanga.

$$\frac{0.3x_{7}}{0.3}=\frac{12.5-4x}{0.3}$$

Mā te whakawehe ki te 0.3 ka wetekia te whakareanga ki te 0.3.

$$x_{7}=\frac{12.5-4x}{0.3}$$

Whakawehe 12.5-4x ki te 0.3 mā te whakarea 12.5-4x ki te tau huripoki o 0.3.

$$x_{7}=\frac{125-40x}{3}$$