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systeme de 2 equation a deux inconnu

x-3x=2

2x+7y=6

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JUSTYOUNG

x-3x=2

2x+7y=6

 

-2x=2

2x+7y=6

 

x= -1

2*(-1) + 7y = 6

 

x= -1

-2 +7y = 6

 

x= -1

7y = 8

 

x= -1

y= 8/7