-5x-7y=-18;-x+y=-6

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Solution for -5x-7y=-18;-x+y=-6 system of equations: 


  • /| 18-5*x-(7*y) = 0| y-x+6 = 0
  • We try to solve the equation: 18-5*x-(7*y) = 0
  • 18-5*x-7*y = 0 // - 18-5*x
  • -7*y = -(18-5*x) // : -7
  • y = (-(18-5*x))/(-7)
  • y = (18-5*x)/7
  • We insert the solution into one of the initial equations of our system of equations
  • We get a system of equations:
  • /| (18-5*x)/7-x+6 = 0| y = (18-5*x)/7
  • (18-5*x)/7-x+6 = 0
  • 18/7-12/7*x+6 = 0
  • 60/7-12/7*x = 0
  • 60/7-12/7*x = 0 // - 60/7
  • -12/7*x = -60/7 // : -12/7
  • x = -60/7/(-12/7)
  • x = 5
  • We insert the solution into one of the initial equations of our system of equations
  • For y = (18-5*x)/7: 
  • y = (18-5*5)/7
  • y = (18-25)/7
  • y = -7/7
  • y = -1
  • We get a system of equations:
  • /| y = -1| x = 5

 

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