Solve by the addition method:

11x +2y = -1
2x +3y = 13

• 11x +2y = -1 -->(1)
  
  2x +3y = 13 -->(2)
  
  Add (1) nd (2)
  13x + 5y = 12
  13x = 12 - 5y
  x = 12 - 5y/13
  
  Sub x in (2)
  2(12-5y)/13 + 3y = 13
  24-10y+39y = 169
  29y = 145
  y = 5
  
  2x + 3(5) = 13
  2x = -2
  x = -1
  
  x=-1, y=5
  
  
  
• 10 years agoHelpfull: Yes(3) No(0)