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Whakaoti mō x
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Tohaina

3x-8-x=12
Tangohia te x mai i ngā taha e rua.
2x-8=12
Pahekotia te 3x me -x, ka 2x.
2x=12+8
Me tāpiri te 8 ki ngā taha e rua.
2x=20
Tāpirihia te 12 ki te 8, ka 20.
x=\frac{20}{2}
Whakawehea ngā taha e rua ki te 2.
x=10
Whakawehea te 20 ki te 2, kia riro ko 10.