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Ngā Raru Ōrite mai i te Rapu Tukutuku

Tohaina

y=\frac{1}{5}-\frac{4}{5}
Tangohia te \frac{4}{5} mai i ngā taha e rua.
y=\frac{1-4}{5}
Tā te mea he rite te tauraro o \frac{1}{5} me \frac{4}{5}, me tango rāua mā te tango i ō raua taurunga.
y=-\frac{3}{5}
Tangohia te 4 i te 1, ka -3.