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Ngā Raru Ōrite mai i te Rapu Tukutuku

Tohaina

21-y=7
Whakareatia te 7 ki te 3, ka 21.
-y=7-21
Tangohia te 21 mai i ngā taha e rua.
-y=-14
Tangohia te 21 i te 7, ka -14.
y=14
Me whakarea ngā taha e rua ki te -1.