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

Tohaina

180x+120-200x=120
Tangohia te 200x mai i ngā taha e rua.
-20x+120=120
Pahekotia te 180x me -200x, ka -20x.
-20x=120-120
Tangohia te 120 mai i ngā taha e rua.
-20x=0
Tangohia te 120 i te 120, ka 0.
x=0
He ōrite te hua o ngā tau e rua ki 0 ina 0 tētahi o rāua te iti rawa. Tātemea kāore te -20 e ōrite ki 0, me ōrite pū te x ki 0.