Whakaoti i te {l}{7x-4-x=-2x+8}{y=-3x}{z=y}{a=z}{text{Solvefor}btext{where}}{b=a}

$$\left. \begin{array} { l } { 7 x - 4 - x = -2 x + 8 }\\ { y = -3 x }\\ { z = y }\\ { a = z }\\ { \text{Solve for } b \text{ where} } \\ { b = a } \end{array} \right.$$

Whakaoti mō x, y, z, a, b

$$b = -\frac{9}{2} = -4\frac{1}{2} = -4.5$$

Ngā Upane Otinga

Whakaarohia te whārite tuatahi. Pahekotia te 7x me -x, ka 6x.

$$6x-4=-2x+8$$

Me tāpiri te 2x ki ngā taha e rua.

$$6x-4+2x=8$$

Pahekotia te 6x me 2x, ka 8x.

$$8x-4=8$$

Me tāpiri te 4 ki ngā taha e rua.

$$8x=8+4$$

Tāpirihia te 8 ki te 4, ka 12.

$$8x=12$$

Whakawehea ngā taha e rua ki te 8.

$$x=\frac{12}{8}$$

Whakahekea te hautanga \frac{12}{8} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 4.

$$x=\frac{3}{2}$$

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

$$y=-3\times \frac{3}{2}$$

Whakareatia te -3 ki te \frac{3}{2}, ka -\frac{9}{2}.

$$y=-\frac{9}{2}$$

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

$$z=-\frac{9}{2}$$

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

$$a=-\frac{9}{2}$$

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

$$b=-\frac{9}{2}$$

Kua oti te pūnaha te whakatau.

$$x=\frac{3}{2} y=-\frac{9}{2} z=-\frac{9}{2} a=-\frac{9}{2} b=-\frac{9}{2}$$