Whakaoti mō x
x=\frac{z-400y}{500}
Whakaoti mō y
y=\frac{z-500x}{400}
Tohaina
Kua tāruatia ki te papatopenga
500x+400y=z
Whakawhitihia ngā taha kia puta ki te taha mauī ngā kīanga tau taurangi katoa.
500x=z-400y
Tangohia te 400y mai i ngā taha e rua.
\frac{500x}{500}=\frac{z-400y}{500}
Whakawehea ngā taha e rua ki te 500.
x=\frac{z-400y}{500}
Mā te whakawehe ki te 500 ka wetekia te whakareanga ki te 500.
x=\frac{z}{500}-\frac{4y}{5}
Whakawehe z-400y ki te 500.
500x+400y=z
Whakawhitihia ngā taha kia puta ki te taha mauī ngā kīanga tau taurangi katoa.
400y=z-500x
Tangohia te 500x mai i ngā taha e rua.
\frac{400y}{400}=\frac{z-500x}{400}
Whakawehea ngā taha e rua ki te 400.
y=\frac{z-500x}{400}
Mā te whakawehe ki te 400 ka wetekia te whakareanga ki te 400.
y=\frac{z}{400}-\frac{5x}{4}
Whakawehe z-500x ki te 400.
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