Whakaoti mō u
u=12
Tohaina
Kua tāruatia ki te papatopenga
-21\left(-\frac{4}{7}\right)=u
Me whakarea ngā taha e rua ki te -\frac{4}{7}, te tau utu o -\frac{7}{4}.
\frac{-21\left(-4\right)}{7}=u
Tuhia te -21\left(-\frac{4}{7}\right) hei hautanga kotahi.
\frac{84}{7}=u
Whakareatia te -21 ki te -4, ka 84.
12=u
Whakawehea te 84 ki te 7, kia riro ko 12.
u=12
Whakawhitihia ngā taha kia puta ki te taha mauī ngā kīanga tau taurangi katoa.
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