Whakaoti mō n
n=-6
Tohaina
Kua tāruatia ki te papatopenga
2n-0=4n+12
Whakareatia te 0 ki te 4, ka 0.
2n-0-4n=12
Tangohia te 4n mai i ngā taha e rua.
-4n+2n=12
Whakaraupapatia anō ngā kīanga tau.
-2n=12
Pahekotia te -4n me 2n, ka -2n.
n=\frac{12}{-2}
Whakawehea ngā taha e rua ki te -2.
n=-6
Whakawehea te 12 ki te -2, kia riro ko -6.
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