Whakaoti mō x
x=20-2y
Whakaoti mō y
y=-\frac{x}{2}+10
Graph
Tohaina
Kua tāruatia ki te papatopenga
20x=400-40y
Tangohia te 40y mai i ngā taha e rua.
\frac{20x}{20}=\frac{400-40y}{20}
Whakawehea ngā taha e rua ki te 20.
x=\frac{400-40y}{20}
Mā te whakawehe ki te 20 ka wetekia te whakareanga ki te 20.
x=20-2y
Whakawehe 400-40y ki te 20.
40y=400-20x
Tangohia te 20x mai i ngā taha e rua.
\frac{40y}{40}=\frac{400-20x}{40}
Whakawehea ngā taha e rua ki te 40.
y=\frac{400-20x}{40}
Mā te whakawehe ki te 40 ka wetekia te whakareanga ki te 40.
y=-\frac{x}{2}+10
Whakawehe 400-20x ki te 40.
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