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Whakaoti mō x
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Tohaina

2x-4x=-8
Tangohia te 4x mai i ngā taha e rua.
-2x=-8
Pahekotia te 2x me -4x, ka -2x.
x=\frac{-8}{-2}
Whakawehea ngā taha e rua ki te -2.
x=4
Whakawehea te -8 ki te -2, kia riro ko 4.