Whakaoti mō r
r=28
Tohaina
Kua tāruatia ki te papatopenga
5r=7\times 20
Tē taea kia ōrite te tāupe r ki 0 nā te kore tautuhi i te whakawehenga mā te kore. Me whakarea ngā taha e rua o te whārite ki te 7r, arā, te tauraro pātahi he tino iti rawa te kitea o 7,r.
5r=140
Whakareatia te 7 ki te 20, ka 140.
r=\frac{140}{5}
Whakawehea ngā taha e rua ki te 5.
r=28
Whakawehea te 140 ki te 5, kia riro ko 28.
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