Whakaoti mō x
x=4
Graph
Tohaina
Kua tāruatia ki te papatopenga
0.75x+4.5-1.25x=2.5
Tangohia te 1.25x mai i ngā taha e rua.
-0.5x+4.5=2.5
Pahekotia te 0.75x me -1.25x, ka -0.5x.
-0.5x=2.5-4.5
Tangohia te 4.5 mai i ngā taha e rua.
-0.5x=-2
Tangohia te 4.5 i te 2.5, ka -2.
x=\frac{-2}{-0.5}
Whakawehea ngā taha e rua ki te -0.5.
x=\frac{-20}{-5}
Whakarohaina te \frac{-2}{-0.5} mā te whakarea i te taurunga me te tauraro ki te 10.
x=4
Whakawehea te -20 ki te -5, kia riro ko 4.
Ngā Tauira
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