Whakaoti mō x_4
x_{4}=8
Tohaina
Kua tāruatia ki te papatopenga
5+x_{4}=13
Whakawhitihia ngā taha kia puta ki te taha mauī ngā kīanga tau taurangi katoa.
x_{4}=13-5
Tangohia te 5 mai i ngā taha e rua.
x_{4}=8
Tangohia te 5 i te 13, ka 8.
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