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Ophel1234
@Ophel1234
April 2019
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Résoudre par combinaison
3x -10y = 43
2x + 5y = 25
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Résolution par combinaison: (sans oublier les accolades)
3x -10y= 43
2x +5y= 25
2x= 25 -5y
3x -10y= 43
x= 25/2 -5/2y
3(25/2 -5/2y) -10y =43
x= 25/2 -5/2y
75/2 -15/2y -10y = 43
x= 25/2 -5/2y
-15/2y -20/2y = 43 -75/2
x= 25/2 -5/2y
-35/2y = 86/2 -75/2
x= 25/2 -5/2 y
-35/2y = 11/2
y= 11/ 2 * (-2/35)
x= 25/2 -5/2y
y= -11/35
x= 25/2 - 5/2 * (-11/35)
y= -11/35
x= 93/7
Voilà ! J'espère t'avoir aidé(e) ! :)
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3x -10y= 43
2x +5y= 25
2x= 25 -5y
3x -10y= 43
x= 25/2 -5/2y
3(25/2 -5/2y) -10y =43
x= 25/2 -5/2y
75/2 -15/2y -10y = 43
x= 25/2 -5/2y
-15/2y -20/2y = 43 -75/2
x= 25/2 -5/2y
-35/2y = 86/2 -75/2
x= 25/2 -5/2 y
-35/2y = 11/2
y= 11/ 2 * (-2/35)
x= 25/2 -5/2y
y= -11/35
x= 25/2 - 5/2 * (-11/35)
y= -11/35
x= 93/7
Voilà ! J'espère t'avoir aidé(e) ! :)