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Whakaoti mō x
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Tohaina

4x=85-2e
Tangohia te 2e mai i ngā taha e rua.
\frac{4x}{4}=\frac{85-2e}{4}
Whakawehea ngā taha e rua ki te 4.
x=\frac{85-2e}{4}
Mā te whakawehe ki te 4 ka wetekia te whakareanga ki te 4.
x=-\frac{e}{2}+\frac{85}{4}
Whakawehe 85-2e ki te 4.