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

$$x=20$$

$$y=-20$$

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.

$$x-30=-10$$

Me tāpiri te 30 ki ngā taha e rua.

$$x=-10+30$$

Tāpirihia te -10 ki te 30, ka 20.

$$x=20$$

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.

$$y+30=10$$

Tangohia te 30 mai i ngā taha e rua.

$$y=10-30$$

Tangohia te 30 i te 10, ka -20.

$$y=-20$$

Kua oti te pūnaha te whakatau.

$$x=20 y=-20$$