Tīpoka ki ngā ihirangi matua
Whakaoti mō x
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Whakaoti mō y
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Ngā Raru Ōrite mai i te Rapu Tukutuku

Tohaina

x=13-y
Tangohia te y mai i ngā taha e rua.
y=13-x
Tangohia te x mai i ngā taha e rua.