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Meilleure réponse !
  • Utilisateur Brainly
2014-04-10T19:35:38+02:00
-10(3x+10y) = 58
+3(10x+3y) = 72

-30x-100y =-580
+30x+9y = 216

-91y = -364
y = 4

3x+10y = 58
3x+40 = 58
3x =-40+58
x = 6