Whakaoti i te -2y=-1;2x-y=7?

$$- 2 y = - 1 ; 2 x - y = 7 ?$$

Whakaoti mō y, x

$$x = \frac{15}{4} = 3\frac{3}{4} = 3.75$$

$$y=\frac{1}{2}=0.5$$

Ngā Upane Otinga

Whakaarohia te whārite tuatahi. Whakawehea ngā taha e rua ki te -2.

$$y=\frac{-1}{-2}$$

Ka taea te hautanga \frac{-1}{-2} te whakamāmā ki te \frac{1}{2} mā te tango tahi i te tohu tōraro i te taurunga me te tauraro.

$$y=\frac{1}{2}$$

Whakaarohia te whārite tuarua. Me kōkuhu ngā uara tāupe mōhiotia ki te whārite.

$$2x-\frac{1}{2}=7$$

Me tāpiri te \frac{1}{2} ki ngā taha e rua.

$$2x=7+\frac{1}{2}$$

Tāpirihia te 7 ki te \frac{1}{2}, ka \frac{15}{2}.

$$2x=\frac{15}{2}$$

Whakawehea ngā taha e rua ki te 2.

$$x=\frac{\frac{15}{2}}{2}$$

Tuhia te \frac{\frac{15}{2}}{2} hei hautanga kotahi.

$$x=\frac{15}{2\times 2}$$

Whakareatia te 2 ki te 2, ka 4.

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

Kua oti te pūnaha te whakatau.

$$y=\frac{1}{2} x=\frac{15}{4}$$