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Taanadu33
@Taanadu33
May 2019
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Résoudre chaque système par substitution d'une inconnue:
7x-y=-33
-3x+5y=37
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nadiab
Résoudre par méthode substitution
7x-y=-33
-3x+5y=37
-y=-7x-33
-3x+5y=37
y=7x +33
-3x+5(7x+33)=37
y= 7x+33
-3x+35x +165=37
y=7x +33
32x= 37-165
y= 7x+33
x = -4
y= 7(-4) + 33
x= -4
y=5
x=-4 S= { ( -4 ; 5 ) }
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7x-y=-33
-3x+5y=37
-y=-7x-33
-3x+5y=37
y=7x +33
-3x+5(7x+33)=37
y= 7x+33
-3x+35x +165=37
y=7x +33
32x= 37-165
y= 7x+33
x = -4
y= 7(-4) + 33
x= -4
y=5
x=-4 S= { ( -4 ; 5 ) }