Whakaoti i te {l}{3(x+10)=2x-10}{3(y-10)=2y-10}

$$\left\{ \begin{array} { l } { 3 ( x + 10 ) = 2 x - 10 } \\ { 3 ( y - 10 ) = 2 y - 10 } \end{array} \right.$$

Whakaoti mō x, y

$$x=-40$$

$$y=20$$

Ngā Upane Otinga

Whakaarohia te whārite tuatahi. Whakamahia te āhuatanga tohatoha hei whakarea te 3 ki te x+10.

$$3x+30=2x-10$$

Tangohia te 2x mai i ngā taha e rua.

$$3x+30-2x=-10$$

Pahekotia te 3x me -2x, ka x.

$$x+30=-10$$

Tangohia te 30 mai i ngā taha e rua.

$$x=-10-30$$

Tangohia te 30 i te -10, ka -40.

$$x=-40$$

Whakaarohia te whārite tuarua. Whakamahia te āhuatanga tohatoha hei whakarea te 3 ki te y-10.

$$3y-30=2y-10$$

Tangohia te 2y mai i ngā taha e rua.

$$3y-30-2y=-10$$

Pahekotia te 3y me -2y, ka y.

$$y-30=-10$$

Me tāpiri te 30 ki ngā taha e rua.

$$y=-10+30$$

Tāpirihia te -10 ki te 30, ka 20.

$$y=20$$

Kua oti te pūnaha te whakatau.

$$x=-40 y=20$$