Whakaoti i te 7(y-3)=2(y-9)+2y

$$7 ( y - 3 ) = 2 ( y - 9 ) + 2 y$$

Whakaoti mō y

$$y=1$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Whakamahia te āhuatanga tohatoha hei whakarea te 7 ki te y-3.

$$7y-21=2\left(y-9\right)+2y$$

Whakamahia te āhuatanga tohatoha hei whakarea te 2 ki te y-9.

$$7y-21=2y-18+2y$$

Pahekotia te 2y me 2y, ka 4y.

$$7y-21=4y-18$$

Tangohia te 4y mai i ngā taha e rua.

$$7y-21-4y=-18$$

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

$$3y-21=-18$$

Me tāpiri te 21 ki ngā taha e rua.

$$3y=-18+21$$

Tāpirihia te -18 ki te 21, ka 3.

$$3y=3$$

Whakawehea ngā taha e rua ki te 3.

$$y=\frac{3}{3}$$

Whakawehea te 3 ki te 3, kia riro ko 1.

$$y=1$$