Whakaoti i te {l}{2-5x+8={(2)}{(9x)}}{y=-19}{z=y}{text{Solvefor}atext{where}}{a=z}

$$\left. \begin{array} { l } { 2 - 5 x + 8 = {(2)} {(9 x)} }\\ { y = -19 }\\ { z = y }\\ { \text{Solve for } a \text{ where} } \\ { a = z } \end{array} \right.$$

Whakaoti mō x, y, z, a

$$a=-19$$

Ngā Upane Otinga

Whakaarohia te whārite tuatahi. Tāpirihia te 2 ki te 8, ka 10.

$$10-5x=2\times 9x$$

Whakareatia te 2 ki te 9, ka 18.

$$10-5x=18x$$

Tangohia te 18x mai i ngā taha e rua.

$$10-5x-18x=0$$

Pahekotia te -5x me -18x, ka -23x.

$$10-23x=0$$

Tangohia te 10 mai i ngā taha e rua. Ko te tau i tango i te kore ka hua ko tōna korenga.

$$-23x=-10$$

Whakawehea ngā taha e rua ki te -23.

$$x=\frac{-10}{-23}$$

Ka taea te hautanga \frac{-10}{-23} te whakamāmā ki te \frac{10}{23} mā te tango tahi i te tohu tōraro i te taurunga me te tauraro.

$$x=\frac{10}{23}$$

Kua oti te pūnaha te whakatau.

$$x=\frac{10}{23} y=-19 z=-19 a=-19$$