Whakaoti i te {l}{4-2y=7y+13}{z=y}{a=z}{b=a}{c=b}{text{Solvefor}dtext{where}}{d=c}

$$\left. \begin{array} { l } { 4 - 2 y = 7 y + 13 }\\ { z = y }\\ { a = z }\\ { b = a }\\ { c = b }\\ { \text{Solve for } d \text{ where} } \\ { d = c } \end{array} \right.$$

Whakaoti mō y, z, a, b, c, d

$$d=-1$$

Ngā Upane Otinga

Whakaarohia te whārite tuatahi. Tangohia te 7y mai i ngā taha e rua.

$$4-2y-7y=13$$

Pahekotia te -2y me -7y, ka -9y.

$$4-9y=13$$

Tangohia te 4 mai i ngā taha e rua.

$$-9y=13-4$$

Tangohia te 4 i te 13, ka 9.

$$-9y=9$$

Whakawehea ngā taha e rua ki te -9.

$$y=\frac{9}{-9}$$

Whakawehea te 9 ki te -9, kia riro ko -1.

$$y=-1$$

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

$$z=-1$$

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

$$a=-1$$

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

$$b=-1$$

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

$$c=-1$$

Whakaarohia te whārite (6). Me kōkuhu ngā uara tāupe mōhiotia ki te whārite.

$$d=-1$$

Kua oti te pūnaha te whakatau.

$$y=-1 z=-1 a=-1 b=-1 c=-1 d=-1$$