y=-x-4;2x+y=5

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2x+y=8
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Solution for y=-x-4;2x+y=5 system of equations: 


  • /| x+y+4 = 0| 2*x+y-5 = 0
  • We try to solve the equation: x+y+4 = 0
  • x+y+4 = 0 // - x+4
  • y = -(x+4)
  • We insert the solution into one of the initial equations of our system of equations
  • We get a system of equations:
  • /| 2*x-x-5-4 = 0| y = -(x+4)
  • x-9 = 0 // + 9
  • x = 9
  • We insert the solution into one of the initial equations of our system of equations
  • For y = -(x+4): 
  • y = -(4+9)
  • y = -13
  • We get a system of equations:
  • /| y = -13| x = 9

 

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