Whakaoti mō j
j=-2
Tohaina
Kua tāruatia ki te papatopenga
21+3j+3j=9
Me tāpiri te 3j ki ngā taha e rua.
21+6j=9
Pahekotia te 3j me 3j, ka 6j.
6j=9-21
Tangohia te 21 mai i ngā taha e rua.
6j=-12
Tangohia te 21 i te 9, ka -12.
j=\frac{-12}{6}
Whakawehea ngā taha e rua ki te 6.
j=-2
Whakawehea te -12 ki te 6, kia riro ko -2.
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