Tīpoka ki ngā ihirangi matua
Whakaoti mō x
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Whakaoti mō x_3
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Graph

Ngā Raru Ōrite mai i te Rapu Tukutuku

Tohaina

x+28=x_{3}
Whakawhitihia ngā taha kia puta ki te taha mauī ngā kīanga tau taurangi katoa.
x=x_{3}-28
Tangohia te 28 mai i ngā taha e rua.