Whakaoti mō x
x=\frac{680-7y}{3}
Whakaoti mō y
y=\frac{680-3x}{7}
Graph
Tohaina
Kua tāruatia ki te papatopenga
15x=3400-35y
Tangohia te 35y mai i ngā taha e rua.
\frac{15x}{15}=\frac{3400-35y}{15}
Whakawehea ngā taha e rua ki te 15.
x=\frac{3400-35y}{15}
Mā te whakawehe ki te 15 ka wetekia te whakareanga ki te 15.
x=\frac{680-7y}{3}
Whakawehe 3400-35y ki te 15.
35y=3400-15x
Tangohia te 15x mai i ngā taha e rua.
\frac{35y}{35}=\frac{3400-15x}{35}
Whakawehea ngā taha e rua ki te 35.
y=\frac{3400-15x}{35}
Mā te whakawehe ki te 35 ka wetekia te whakareanga ki te 35.
y=\frac{680-3x}{7}
Whakawehe 3400-15x ki te 35.
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