Whakaoti mō x
x=2y-21
Whakaoti mō y
y=\frac{x+21}{2}
Graph
Tohaina
Kua tāruatia ki te papatopenga
-x=21-2y
Tangohia te 2y mai i ngā taha e rua.
\frac{-x}{-1}=\frac{21-2y}{-1}
Whakawehea ngā taha e rua ki te -1.
x=\frac{21-2y}{-1}
Mā te whakawehe ki te -1 ka wetekia te whakareanga ki te -1.
x=2y-21
Whakawehe 21-2y ki te -1.
2y=21+x
Me tāpiri te x ki ngā taha e rua.
2y=x+21
He hanga arowhānui tō te whārite.
\frac{2y}{2}=\frac{x+21}{2}
Whakawehea ngā taha e rua ki te 2.
y=\frac{x+21}{2}
Mā te whakawehe ki te 2 ka wetekia te whakareanga ki te 2.
Ngā Tauira
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