Whakaoti mō g
g\leq -13
Tohaina
Kua tāruatia ki te papatopenga
-19+2g\geq 20+5g
Tāpirihia te 19 ki te 1, ka 20.
-19+2g-5g\geq 20
Tangohia te 5g mai i ngā taha e rua.
-19-3g\geq 20
Pahekotia te 2g me -5g, ka -3g.
-3g\geq 20+19
Me tāpiri te 19 ki ngā taha e rua.
-3g\geq 39
Tāpirihia te 20 ki te 19, ka 39.
g\leq \frac{39}{-3}
Whakawehea ngā taha e rua ki te -3. Nō te mea he <0 te -3, ka hurihia te ahunga koreōrite.
g\leq -13
Whakawehea te 39 ki te -3, kia riro ko -13.
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