Tīpoka ki ngā ihirangi matua
Whakaoti mō x
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Whakaoti mō y
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Tohaina

y=-2x-5
Pahekotia te x me -3x, ka -2x.
-2x-5=y
Whakawhitihia ngā taha kia puta ki te taha mauī ngā kīanga tau taurangi katoa.
-2x=y+5
Me tāpiri te 5 ki ngā taha e rua.
\frac{-2x}{-2}=\frac{y+5}{-2}
Whakawehea ngā taha e rua ki te -2.
x=\frac{y+5}{-2}
Mā te whakawehe ki te -2 ka wetekia te whakareanga ki te -2.
x=\frac{-y-5}{2}
Whakawehe y+5 ki te -2.
y=-2x-5
Pahekotia te x me -3x, ka -2x.