Whakaoti mō x
x=-10
Graph
Tohaina
Kua tāruatia ki te papatopenga
2+x-1.2x=4
Tangohia te 1.2x mai i ngā taha e rua.
2-0.2x=4
Pahekotia te x me -1.2x, ka -0.2x.
-0.2x=4-2
Tangohia te 2 mai i ngā taha e rua.
-0.2x=2
Tangohia te 2 i te 4, ka 2.
x=\frac{2}{-0.2}
Whakawehea ngā taha e rua ki te -0.2.
x=\frac{20}{-2}
Whakarohaina te \frac{2}{-0.2} mā te whakarea i te taurunga me te tauraro ki te 10.
x=-10
Whakawehea te 20 ki te -2, kia riro ko -10.
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