Whakaoti mō r
r=-\frac{5}{11}\approx -0.454545455
Tohaina
Kua tāruatia ki te papatopenga
-\frac{1}{5}r-2r=1
Tangohia te 2r mai i ngā taha e rua.
-\frac{11}{5}r=1
Pahekotia te -\frac{1}{5}r me -2r, ka -\frac{11}{5}r.
r=1\left(-\frac{5}{11}\right)
Me whakarea ngā taha e rua ki te -\frac{5}{11}, te tau utu o -\frac{11}{5}.
r=-\frac{5}{11}
Whakareatia te 1 ki te -\frac{5}{11}, ka -\frac{5}{11}.
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