Tīpoka ki ngā ihirangi matua
Whakaoti mō j
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Tohaina

2j=10
Pahekotia te 6j me -4j, ka 2j.
j=\frac{10}{2}
Whakawehea ngā taha e rua ki te 2.
j=5
Whakawehea te 10 ki te 2, kia riro ko 5.