x+y=480;x-y=400

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Solution for x+y=480;x-y=400 system of equations:


  • /| x+y-480 = 0| x-y-400 = 0
  • We try to solve the equation: x+y-480 = 0
  • x+y-480 = 0 / - x-480
  • y = -(x-480)
  • y = 480-x
  • We insert the solution into one of the initial equations of our system of equations
  • We get a system of equations:
  • /| x+x-480-400 = 0| y = 480-x
  • 2*x-880 = 0 / + 880
  • 2*x = 880 / : 2
  • x = 880/2
  • x = 440
  • We insert the solution into one of the initial equations of our system of equations
  • For y = 480-x:
  • y = 480-440
  • y = 40
  • We get a system of equations:
  • /| y = 40| x = 440

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