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Whakaoti mō x
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Tohaina

1800=120x
Whakareatia te 10 ki te 12, ka 120.
120x=1800
Whakawhitihia ngā taha kia puta ki te taha mauī ngā kīanga tau taurangi katoa.
x=\frac{1800}{120}
Whakawehea ngā taha e rua ki te 120.
x=15
Whakawehea te 1800 ki te 120, kia riro ko 15.