Réponse :
bonjour
x+y=45
200x+100y=7500
x= -y+45
200(-y+45) +100y = 7500
-200y + 9000+100y=7500
-100y= -1500
y = - 1500 / -100
y = 15
x= -y+45= -15+45= 30
x = 30
S= { 30; 15}
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Réponse :
bonjour
x+y=45
200x+100y=7500
x= -y+45
200(-y+45) +100y = 7500
-200y + 9000+100y=7500
-100y= -1500
y = - 1500 / -100
y = 15
x= -y+45= -15+45= 30
x = 30
S= { 30; 15}