Whakaoti mō a
a=-2P+4b-2c
Whakaoti mō P
P=-\frac{a}{2}+2b-c
Tohaina
Kua tāruatia ki te papatopenga
-\frac{1}{2}a+2b-c=P
Whakawhitihia ngā taha kia puta ki te taha mauī ngā kīanga tau taurangi katoa.
-\frac{1}{2}a-c=P-2b
Tangohia te 2b mai i ngā taha e rua.
-\frac{1}{2}a=P-2b+c
Me tāpiri te c ki ngā taha e rua.
\frac{-\frac{1}{2}a}{-\frac{1}{2}}=\frac{P-2b+c}{-\frac{1}{2}}
Me whakarea ngā taha e rua ki te -2.
a=\frac{P-2b+c}{-\frac{1}{2}}
Mā te whakawehe ki te -\frac{1}{2} ka wetekia te whakareanga ki te -\frac{1}{2}.
a=-2P+4b-2c
Whakawehe P-2b+c ki te -\frac{1}{2} mā te whakarea P-2b+c ki te tau huripoki o -\frac{1}{2}.
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