Whakaoti mō x
x=-3
Graph
Tohaina
Kua tāruatia ki te papatopenga
0.5x+0.4-1.4x=3.1
Tangohia te 1.4x mai i ngā taha e rua.
-0.9x+0.4=3.1
Pahekotia te 0.5x me -1.4x, ka -0.9x.
-0.9x=3.1-0.4
Tangohia te 0.4 mai i ngā taha e rua.
-0.9x=2.7
Tangohia te 0.4 i te 3.1, ka 2.7.
x=\frac{2.7}{-0.9}
Whakawehea ngā taha e rua ki te -0.9.
x=\frac{27}{-9}
Whakarohaina te \frac{2.7}{-0.9} mā te whakarea i te taurunga me te tauraro ki te 10.
x=-3
Whakawehea te 27 ki te -9, kia riro ko -3.
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