Whakaoti mō x
x=\frac{4\left(y+5\right)}{5}
Whakaoti mō y
y=\frac{5\left(x-4\right)}{4}
Graph
Tohaina
Kua tāruatia ki te papatopenga
5x=20+4y
Me tāpiri te 4y ki ngā taha e rua.
5x=4y+20
He hanga arowhānui tō te whārite.
\frac{5x}{5}=\frac{4y+20}{5}
Whakawehea ngā taha e rua ki te 5.
x=\frac{4y+20}{5}
Mā te whakawehe ki te 5 ka wetekia te whakareanga ki te 5.
x=\frac{4y}{5}+4
Whakawehe 20+4y ki te 5.
-4y=20-5x
Tangohia te 5x mai i ngā taha e rua.
\frac{-4y}{-4}=\frac{20-5x}{-4}
Whakawehea ngā taha e rua ki te -4.
y=\frac{20-5x}{-4}
Mā te whakawehe ki te -4 ka wetekia te whakareanga ki te -4.
y=\frac{5x}{4}-5
Whakawehe 20-5x ki te -4.
Ngā Tauira
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{ x } ^ { 2 } - 4 x - 5 = 0
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