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Tohaina

-2n-4=0
Pahekotia te 3n me -5n, ka -2n.
-2n=4
Me tāpiri te 4 ki ngā taha e rua. Ko te tau i tāpiria he kore ka hua koia tonu.
n=\frac{4}{-2}
Whakawehea ngā taha e rua ki te -2.
n=-2
Whakawehea te 4 ki te -2, kia riro ko -2.