Résolution de 3 équations à 3 inconnues :

* a +
* b +
* c =
* a +
* b +
* c =
* a +
* b +
* c =
a =
b =
Det =
c =
(Remplir les cases grises)

Det = a1*b2*c3+b1*c2*a3+c1*a2*b3-a3*b2*c1-b3*c2*a1-c3*a2*b1

da = y1*b2*c3+b1*c2*y3+c1*y2*b3-y3*b2*c1-b3*c2*y1-c3*y2*b1

db = a1*y2*c3+y1*c2*a3+c1*a2*y3-a3*y2*c1-y3*c2*a1-c3*a2*y1

dc = a1*b2*y3+b1*y2*a3+y1*a2*b3-a3*b2*y1-b3*y2*a1-y3*a2*b1

a = da / Det , b = db / Det , c = dc / Det

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