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

Tohaina

20x-390=500
Whakawhitihia ngā taha kia puta ki te taha mauī ngā kīanga tau taurangi katoa.
20x=500+390
Me tāpiri te 390 ki ngā taha e rua.
20x=890
Tāpirihia te 500 ki te 390, ka 890.
x=\frac{890}{20}
Whakawehea ngā taha e rua ki te 20.
x=\frac{89}{2}
Whakahekea te hautanga \frac{890}{20} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 10.