Whakaoti mō x
x=\frac{7\left(y+3\right)}{3}
Whakaoti mō y
y=\frac{3\left(x-7\right)}{7}
Graph
Tohaina
Kua tāruatia ki te papatopenga
3x=21+7y
Me tāpiri te 7y ki ngā taha e rua.
3x=7y+21
He hanga arowhānui tō te whārite.
\frac{3x}{3}=\frac{7y+21}{3}
Whakawehea ngā taha e rua ki te 3.
x=\frac{7y+21}{3}
Mā te whakawehe ki te 3 ka wetekia te whakareanga ki te 3.
x=\frac{7y}{3}+7
Whakawehe 21+7y ki te 3.
-7y=21-3x
Tangohia te 3x mai i ngā taha e rua.
\frac{-7y}{-7}=\frac{21-3x}{-7}
Whakawehea ngā taha e rua ki te -7.
y=\frac{21-3x}{-7}
Mā te whakawehe ki te -7 ka wetekia te whakareanga ki te -7.
y=\frac{3x}{7}-3
Whakawehe 21-3x ki te -7.
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