Exercices : Resolution de systemes d'equations

Résoudre les systemes suivants

• 2x + 3y = 1 x − 3y = 5
  
  Solution:
  
  x =
  y =

  ---

  
  
  
• 4x − 3y = 11 −x + 2y = 1
  
  Solution:
  
  x =
  y =
• −3x − 2y = 18 6x + 5y = −42
  
  Solution:
  
  x =
  y =