Whakaoti mō n
n=\frac{b_{n}-15}{15}
Whakaoti mō b_n
b_{n}=15\left(n+1\right)
Tohaina
Kua tāruatia ki te papatopenga
15+15n=b_{n}
Whakawhitihia ngā taha kia puta ki te taha mauī ngā kīanga tau taurangi katoa.
15n=b_{n}-15
Tangohia te 15 mai i ngā taha e rua.
\frac{15n}{15}=\frac{b_{n}-15}{15}
Whakawehea ngā taha e rua ki te 15.
n=\frac{b_{n}-15}{15}
Mā te whakawehe ki te 15 ka wetekia te whakareanga ki te 15.
n=\frac{b_{n}}{15}-1
Whakawehe b_{n}-15 ki te 15.
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