Whakaoti i te {l}{3x-2{(0*7+20)}=3*6-1*7x}{y=2}{z=y}{text{Solvefor}atext{where}}{a=z}

$$\left. \begin{array} { l } { 3 x - 2 {(0 \cdot 7 + 20)} = 3 \cdot 6 - 1 \cdot 7 x }\\ { y = 2 }\\ { z = y }\\ { \text{Solve for } a \text{ where} } \\ { a = z } \end{array} \right.$$

Whakaoti mō x, y, z, a

$$a=2$$

Ngā Upane Otinga

Whakaarohia te whārite tuatahi. Whakareatia te 0 ki te 7, ka 0.

$$3x-2\left(0+20\right)=3\times 6-1\times 7x$$

Tāpirihia te 0 ki te 20, ka 20.

$$3x-2\times 20=3\times 6-1\times 7x$$

Whakareatia te 2 ki te 20, ka 40.

$$3x-40=3\times 6-1\times 7x$$

Whakareatia te 3 ki te 6, ka 18.

$$3x-40=18-1\times 7x$$

Whakareatia te 1 ki te 7, ka 7.

$$3x-40=18-7x$$

Me tāpiri te 7x ki ngā taha e rua.

$$3x-40+7x=18$$

Pahekotia te 3x me 7x, ka 10x.

$$10x-40=18$$

Me tāpiri te 40 ki ngā taha e rua.

$$10x=18+40$$

Tāpirihia te 18 ki te 40, ka 58.

$$10x=58$$

Whakawehea ngā taha e rua ki te 10.

$$x=\frac{58}{10}$$

Whakahekea te hautanga \frac{58}{10} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 2.

$$x=\frac{29}{5}$$

Kua oti te pūnaha te whakatau.

$$x=\frac{29}{5} y=2 z=2 a=2$$