Whakaoti mō x
x=\frac{28-4y}{5}
Whakaoti mō y
y=-\frac{5x}{4}+7
Graph
Tohaina
Kua tāruatia ki te papatopenga
5x+4y=28
Pahekotia te 3x me 2x, ka 5x.
5x=28-4y
Tangohia te 4y mai i ngā taha e rua.
\frac{5x}{5}=\frac{28-4y}{5}
Whakawehea ngā taha e rua ki te 5.
x=\frac{28-4y}{5}
Mā te whakawehe ki te 5 ka wetekia te whakareanga ki te 5.
5x+4y=28
Pahekotia te 3x me 2x, ka 5x.
4y=28-5x
Tangohia te 5x mai i ngā taha e rua.
\frac{4y}{4}=\frac{28-5x}{4}
Whakawehea ngā taha e rua ki te 4.
y=\frac{28-5x}{4}
Mā te whakawehe ki te 4 ka wetekia te whakareanga ki te 4.
y=-\frac{5x}{4}+7
Whakawehe 28-5x ki te 4.
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