Whakaoti mō y
y=40
Graph
Tohaina
Kua tāruatia ki te papatopenga
2y+1=81
Pūruatia ngā taha e rua o te whārite.
2y+1-1=81-1
Me tango 1 mai i ngā taha e rua o te whārite.
2y=81-1
Mā te tango i te 1 i a ia ake anō ka toe ko te 0.
2y=80
Tango 1 mai i 81.
\frac{2y}{2}=\frac{80}{2}
Whakawehea ngā taha e rua ki te 2.
y=\frac{80}{2}
Mā te whakawehe ki te 2 ka wetekia te whakareanga ki te 2.
y=40
Whakawehe 80 ki te 2.
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