x-4y-8=0;5x+2y+4=0

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Remember to put linear equations with variables x and y.
for example:
2x+y=8
x+3y=14

Solution for x-4y-8=0;5x+2y+4=0 system of equations: 


  • /| x-(4*y)-8 = 0| 5*x+2*y+4 = 0
  • We try to solve the equation: x-(4*y)-8 = 0
  • x-4*y-8 = 0 // - x-8
  • -4*y = -(x-8) // : -4
  • y = (-(x-8))/(-4)
  • y = (8-x)/(-4)
  • We insert the solution into one of the initial equations of our system of equations
  • We get a system of equations:
  • /| 2*((8-x)/(-4))+5*x+4 = 0| y = (8-x)/(-4)
  • (2*(8-x))/(-4)+5*x+4 = 0
  • 11/2*x-4+4 = 0
  • 11/2*x = 0
  • 11/2*x = 0 // : 11/2
  • x = 0
  • We insert the solution into one of the initial equations of our system of equations
  • For y = (8-x)/(-4): 
  • y = (0+8)/(-4)
  • y = 8/(-4)
  • y = -2
  • We get a system of equations:
  • /| y = -2| x = 0

 

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