Whakaoti i te y-3+6y-9+12y-15=y

$$y - 3 + 6 y - 9 + 12 y - 15 = y$$

Whakaoti mō y

$$y = \frac{3}{2} = 1\frac{1}{2} = 1.5$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Pahekotia te y me 6y, ka 7y.

$$7y-3-9+12y-15=y$$

Tangohia te 9 i te -3, ka -12.

$$7y-12+12y-15=y$$

Pahekotia te 7y me 12y, ka 19y.

$$19y-12-15=y$$

Tangohia te 15 i te -12, ka -27.

$$19y-27=y$$

Tangohia te y mai i ngā taha e rua.

$$19y-27-y=0$$

Pahekotia te 19y me -y, ka 18y.

$$18y-27=0$$

Me tāpiri te 27 ki ngā taha e rua. Ko te tau i tāpiria he kore ka hua koia tonu.

$$18y=27$$

Whakawehea ngā taha e rua ki te 18.

$$y=\frac{27}{18}$$

Whakahekea te hautanga \frac{27}{18} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 9.

$$y=\frac{3}{2}$$