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Whakaoti mō x
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Tohaina

17-x-x=13
Tāpirihia te 5 ki te 12, ka 17.
17-2x=13
Pahekotia te -x me -x, ka -2x.
-2x=13-17
Tangohia te 17 mai i ngā taha e rua.
-2x=-4
Tangohia te 17 i te 13, ka -4.
x=\frac{-4}{-2}
Whakawehea ngā taha e rua ki te -2.
x=2
Whakawehea te -4 ki te -2, kia riro ko 2.