Whakaoti mō r
r=17
Tohaina
Kua tāruatia ki te papatopenga
21\times \frac{3.4}{4.2}=r
Whakareatia ngā taha e rua o te whārite ki te 21.
21\times \frac{34}{42}=r
Whakarohaina te \frac{3.4}{4.2} mā te whakarea i te taurunga me te tauraro ki te 10.
21\times \frac{17}{21}=r
Whakahekea te hautanga \frac{34}{42} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 2.
17=r
Me whakakore te 21 me te 21.
r=17
Whakawhitihia ngā taha kia puta ki te taha mauī ngā kīanga tau taurangi katoa.
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