Whakaoti i te 3(x-2)+4(x+7)=57

$$3 ( x - 2 ) + 4 ( x + 7 ) = 57$$

Whakaoti mō x

$$x=5$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Whakamahia te āhuatanga tohatoha hei whakarea te 3 ki te x-2.

$$3x-6+4\left(x+7\right)=57$$

Whakamahia te āhuatanga tohatoha hei whakarea te 4 ki te x+7.

$$3x-6+4x+28=57$$

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

$$7x-6+28=57$$

Tāpirihia te -6 ki te 28, ka 22.

$$7x+22=57$$

Tangohia te 22 mai i ngā taha e rua.

$$7x=57-22$$

Tangohia te 22 i te 57, ka 35.

$$7x=35$$

Whakawehea ngā taha e rua ki te 7.

$$x=\frac{35}{7}$$

Whakawehea te 35 ki te 7, kia riro ko 5.

$$x=5$$