Whakaoti mō r
r=-\frac{1}{5}=-0.2
Tohaina
Kua tāruatia ki te papatopenga
18r+9+57r=-6
Me tāpiri te 57r ki ngā taha e rua.
75r+9=-6
Pahekotia te 18r me 57r, ka 75r.
75r=-6-9
Tangohia te 9 mai i ngā taha e rua.
75r=-15
Tangohia te 9 i te -6, ka -15.
r=\frac{-15}{75}
Whakawehea ngā taha e rua ki te 75.
r=-\frac{1}{5}
Whakahekea te hautanga \frac{-15}{75} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 15.
Ngā Tauira
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