7x-11y=-89;13x-8y=-128

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Solution for 7x-11y=-89;13x-8y=-128 system of equations: 


  • /| 7*x-(11*y)+89 = 0| 13*x-(8*y)+128 = 0
  • We try to solve the equation: 7*x-(11*y)+89 = 0
  • 7*x-11*y+89 = 0 // - 7*x+89
  • -11*y = -(7*x+89) // : -11
  • y = (-(7*x+89))/(-11)
  • y = (7*x+89)/11
  • We insert the solution into one of the initial equations of our system of equations
  • We get a system of equations:
  • /| 13*x-(8*((7*x+89)/11))+128 = 0| y = (7*x+89)/11
  • (-1*8*(7*x+89))/11+13*x+128 = 0
  • 87/11*x-712/11+128 = 0
  • 87/11*x+696/11 = 0
  • 87/11*x+696/11 = 0 // - 696/11
  • 87/11*x = -696/11 // : 87/11
  • x = -696/11/87/11
  • x = -8
  • We insert the solution into one of the initial equations of our system of equations
  • For y = (7*x+89)/11: 
  • y = (89-8*7)/11
  • y = (89-56)/11
  • y = 33/11
  • y = 3
  • We get a system of equations:
  • /| y = 3| x = -8

 

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