Whakaoti mō x
x=\frac{15-\alpha }{2}
Whakaoti mō α
\alpha =15-2x
Graph
Tohaina
Kua tāruatia ki te papatopenga
2x-1+4+\alpha =18
Pahekotia te x me x, ka 2x.
2x+3+\alpha =18
Tāpirihia te -1 ki te 4, ka 3.
2x+\alpha =18-3
Tangohia te 3 mai i ngā taha e rua.
2x+\alpha =15
Tangohia te 3 i te 18, ka 15.
2x=15-\alpha
Tangohia te \alpha mai i ngā taha e rua.
\frac{2x}{2}=\frac{15-\alpha }{2}
Whakawehea ngā taha e rua ki te 2.
x=\frac{15-\alpha }{2}
Mā te whakawehe ki te 2 ka wetekia te whakareanga ki te 2.
2x-1+4+\alpha =18
Pahekotia te x me x, ka 2x.
2x+3+\alpha =18
Tāpirihia te -1 ki te 4, ka 3.
3+\alpha =18-2x
Tangohia te 2x mai i ngā taha e rua.
\alpha =18-2x-3
Tangohia te 3 mai i ngā taha e rua.
\alpha =15-2x
Tangohia te 3 i te 18, ka 15.
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