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¨PAR COMBINAISON
a) 2x+ 5y =7
3x+ 4y = -3
b) 3x + 5y= 2
5x + 2y = -1
c) 2x - 5y = -1
3x + 7y = 4
¨PAR COMBINAISON
a) 2x+ 5y =7
3x+ 4y = -3
b) 3x + 5y= 2
5x + 2y = -1
c) 2x - 5y = -1
3x + 7y = 4
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