3x-y=9;-3x+y=-9

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

Solution for 3x-y=9;-3x+y=-9 system of equations:


  • /| 3*x-y-9 = 0| y-3*x+9 = 0
  • We try to solve the equation: 3*x-y-9 = 0
  • 3*x-y-9 = 0 / - 3*x-9
  • -y = -(3*x-9) / * -1
  • y = 3*x-9
  • We insert the solution into one of the initial equations of our system of equations
  • We get a system of equations:
  • /| 3*x-3*x-9+9 = 0| y = 3*x-9
  • The system of equations has infinitely many solutions

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