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

Tohaina

x<-5-2
Tangohia te 2 mai i ngā taha e rua.
x<-7
Tangohia te 2 i te -5, ka -7.