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Ngā Raru Ōrite mai i te Rapu Tukutuku

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\frac{5}{21}-\frac{1}{x}
Whakahekea te hautanga \frac{50}{210} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 10.
\frac{5x}{21x}-\frac{21}{21x}
Hei tāpiri, hei tango kīanga rānei, me whakaroha ērā kia rite ā rātou tauraro. Ko te taurea pātahi iti rawa o 21 me x ko 21x. Whakareatia \frac{5}{21} ki te \frac{x}{x}. Whakareatia \frac{1}{x} ki te \frac{21}{21}.
\frac{5x-21}{21x}
Tā te mea he rite te tauraro o \frac{5x}{21x} me \frac{21}{21x}, me tango rāua mā te tango i ō raua taurunga.