Whakaoti i te 7/2=-2x+20

$$\frac{ 7 }{ 2 } =-2x+20$$

Whakaoti mō x

$$x = \frac{33}{4} = 8\frac{1}{4} = 8.25$$

Ngā Upane mō te Whakaoti Whārite Rārangi

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

$$-2x+20=\frac{7}{2}$$

Tangohia te 20 mai i ngā taha e rua.

$$-2x=\frac{7}{2}-20$$

Me tahuri te 20 ki te hautau \frac{40}{2}.

$$-2x=\frac{7}{2}-\frac{40}{2}$$

Tā te mea he rite te tauraro o \frac{7}{2} me \frac{40}{2}, me tango rāua mā te tango i ō raua taurunga.

$$-2x=\frac{7-40}{2}$$

Tangohia te 40 i te 7, ka -33.

$$-2x=-\frac{33}{2}$$

Whakawehea ngā taha e rua ki te -2.

$$x=\frac{-\frac{33}{2}}{-2}$$

Tuhia te \frac{-\frac{33}{2}}{-2} hei hautanga kotahi.

$$x=\frac{-33}{2\left(-2\right)}$$

Whakareatia te 2 ki te -2, ka -4.

$$x=\frac{-33}{-4}$$

Ka taea te hautanga \frac{-33}{-4} te whakamāmā ki te \frac{33}{4} mā te tango tahi i te tohu tōraro i te taurunga me te tauraro.

$$x=\frac{33}{4}$$