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Whakaoti mō y
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Tohaina

4+y=7
Whakawhitihia ngā taha kia puta ki te taha mauī ngā kīanga tau taurangi katoa.
y=7-4
Tangohia te 4 mai i ngā taha e rua.
y=3
Tangohia te 4 i te 7, ka 3.