-4x+y=-13;2x-5y=-7

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

Solution for -4x+y=-13;2x-5y=-7 system of equations: 


  • /| y-4*x+13 = 0| 2*x-(5*y)+7 = 0
  • We try to solve the equation: y-4*x+13 = 0
  • y-4*x+13 = 0 // - 13-4*x
  • y = -(13-4*x)
  • We insert the solution into one of the initial equations of our system of equations
  • We get a system of equations:
  • /| 2*x-(5*(-(13-4*x)))+7 = 0| y = -(13-4*x)
  • 2*x-1*5*(4*x-13)+7 = 0
  • 7-18*x+65 = 0
  • 72-18*x = 0
  • 72-18*x = 0 // - 72
  • -18*x = -72 // : -18
  • x = -72/(-18)
  • x = 4
  • We insert the solution into one of the initial equations of our system of equations
  • For y = -(13-4*x): 
  • y = -(13-4*4)
  • y = -(13-16)
  • y = 3
  • We get a system of equations:
  • /| y = 3| x = 4

 

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