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Whakaoti mō z
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Tohaina

5-z=\frac{4}{2}
Whakawehea ngā taha e rua ki te 2.
5-z=2
Whakawehea te 4 ki te 2, kia riro ko 2.
-z=2-5
Tangohia te 5 mai i ngā taha e rua.
-z=-3
Tangohia te 5 i te 2, ka -3.
z=3
Me whakarea ngā taha e rua ki te -1.