Whakaoti i te {l}{3x+y=7quad(x-2)Rightarrow6x+2y=14}{2x-5y=13(x-3)Rightarrow6x-15y=99}

$$\left. \begin{array} { l } { 3 x + y = 7 \quad ( x - 2 ) \Rightarrow 6 x + 2 y = 14 } \\ { 2 x - 5 y = 13 ( x - 3 ) \Rightarrow 6 x - 15 y = 99 } \end{array} \right.$$

Whakaoti mō x

$$x=\frac{y+14}{4}$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Whakamahia te āhuatanga tohatoha hei whakarea te 7 ki te x-2.

$$3x+y=7x-14$$

Tangohia te 7x mai i ngā taha e rua.

$$3x+y-7x=-14$$

Pahekotia te 3x me -7x, ka -4x.

$$-4x+y=-14$$

Tangohia te y mai i ngā taha e rua.

$$-4x=-14-y$$

He hanga arowhānui tō te whārite.

$$-4x=-y-14$$

Whakawehea ngā taha e rua ki te -4.

$$\frac{-4x}{-4}=\frac{-y-14}{-4}$$

Mā te whakawehe ki te -4 ka wetekia te whakareanga ki te -4.

$$x=\frac{-y-14}{-4}$$

Whakawehe -14-y ki te -4.

$$x=\frac{y}{4}+\frac{7}{2}$$