Whakaoti i te {l}{13=-4x+6}{y=x+7}{z=y}{text{Solvefor}atext{where}}{a=z}

$$\left. \begin{array} { l } { 13 = -4 x + 6 }\\ { y = x + 7 }\\ { z = y }\\ { \text{Solve for } a \text{ where} } \\ { a = z } \end{array} \right.$$

Whakaoti mō x, y, z, a

$$a = \frac{21}{4} = 5\frac{1}{4} = 5.25$$

Ngā Upane Otinga

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

$$-4x+6=13$$

Tangohia te 6 mai i ngā taha e rua.

$$-4x=13-6$$

Tangohia te 6 i te 13, ka 7.

$$-4x=7$$

Whakawehea ngā taha e rua ki te -4.

$$x=-\frac{7}{4}$$

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

$$y=-\frac{7}{4}+7$$

Tāpirihia te -\frac{7}{4} ki te 7, ka \frac{21}{4}.

$$y=\frac{21}{4}$$

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

$$z=\frac{21}{4}$$

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

$$a=\frac{21}{4}$$

Kua oti te pūnaha te whakatau.

$$x=-\frac{7}{4} y=\frac{21}{4} z=\frac{21}{4} a=\frac{21}{4}$$