Tīpoka ki ngā ihirangi matua
Whakaoti mō x
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Tohaina

x+x\times 0=180
Whakareatia te 0 ki te 8, ka 0.
x+0=180
Ko te tau i whakarea ki te kore ka hua ko te kore.
x=180
Ko te tau i tāpiria he kore ka hua koia tonu.