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Sagot :

AENEAS

On a 4x - y = 9

Donc y = 4x-9

 

Et 5x+y = 3

Donc y = 3-5x

 

D'où : 4x-9 = 3-5x

On a alors :

4x+5x = 3+9

9x = 12

x = 12/9 = 4/3

 

Et y = 4(4/3) - 9

y = 16/3 - 27/3

y = -11/3

 

FIN

 

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