Tīpoka ki ngā ihirangi matua
Whakaoti mō x
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Graph

Ngā Raru Ōrite mai i te Rapu Tukutuku

Tohaina

9x=91-1
Tangohia te 1 mai i ngā taha e rua.
9x=90
Tangohia te 1 i te 91, ka 90.
x=\frac{90}{9}
Whakawehea ngā taha e rua ki te 9.
x=10
Whakawehea te 90 ki te 9, kia riro ko 10.