Whakaoti i te 2x-3(-21/2)=9

$$2x-3(-2 \frac{ 1 }{ 2 } ) = 9$$

Whakaoti mō x

$$x=\frac{3}{4}=0.75$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Whakareatia ngā taha e rua o te whārite ki te 2.

$$4x-6\left(-\frac{2\times 2+1}{2}\right)=18$$

Whakareatia te 2 ki te 2, ka 4.

$$4x-6\left(-\frac{4+1}{2}\right)=18$$

Tāpirihia te 4 ki te 1, ka 5.

$$4x-6\left(-\frac{5}{2}\right)=18$$

Tuhia te 6\left(-\frac{5}{2}\right) hei hautanga kotahi.

$$4x-\frac{6\left(-5\right)}{2}=18$$

Whakareatia te 6 ki te -5, ka -30.

$$4x-\frac{-30}{2}=18$$

Whakawehea te -30 ki te 2, kia riro ko -15.

$$4x-\left(-15\right)=18$$

Ko te tauaro o -15 ko 15.

$$4x+15=18$$

Tangohia te 15 mai i ngā taha e rua.

$$4x=18-15$$

Tangohia te 15 i te 18, ka 3.

$$4x=3$$

Whakawehea ngā taha e rua ki te 4.

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