x-y=11;2x+y=4

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for example:
2x+y=8
x+3y=14

Solution for x-y=11;2x+y=4 system of equations:


  • /| x-y-11 = 0| 2*x+y-4 = 0
  • We try to solve the equation: x-y-11 = 0
  • x-y-11 = 0 / - x-11
  • -y = -(x-11) / * -1
  • y = x-11
  • We insert the solution into one of the initial equations of our system of equations
  • We get a system of equations:
  • /| 2*x+x-11-4 = 0| y = x-11
  • 3*x-15 = 0 / + 15
  • 3*x = 15 / : 3
  • x = 15/3
  • x = 5
  • We insert the solution into one of the initial equations of our system of equations
  • For y = x-11:
  • y = 5-11
  • y = -6
  • We get a system of equations:
  • /| y = -6| x = 5

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